diff --git a/examples/basic-dom/package.json b/examples/basic-dom/package.json
index 76347e5..95a283d 100644
--- a/examples/basic-dom/package.json
+++ b/examples/basic-dom/package.json
@@ -11,6 +11,6 @@
     "parcel-bundler": "^1.12.5",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   }
 }
diff --git a/package.json b/package.json
index d83c9f9..109c019 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "lint-staged": "^13.0.3",
     "node-gyp": "^9.1.0",
     "prettier": "^2.3.2",
-    "typescript": "4.6.4",
+    "typescript": "5.1.6",
     "yaml": "^2.3.1"
   },
   "packageManager": "yarn@3.2.0",
diff --git a/packages/benchmarks/package.json b/packages/benchmarks/package.json
index af792c3..a7d65bb 100644
--- a/packages/benchmarks/package.json
+++ b/packages/benchmarks/package.json
@@ -25,6 +25,6 @@
     "@types/react": "^18.0.25",
     "esbuild": "^0.15.15",
     "esbuild-register": "^3.4.1",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   }
 }
diff --git a/packages/browser-bundles/package.json b/packages/browser-bundles/package.json
index a06a2ca..1116857 100644
--- a/packages/browser-bundles/package.json
+++ b/packages/browser-bundles/package.json
@@ -25,7 +25,7 @@
     "esbuild": "^0.12.15",
     "esbuild-register": "^2.5.0",
     "npm-run-all": "^4.1.5",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   },
   "peerDependencies": {
     "@theatre/core": "*",
diff --git a/packages/dataverse-experiments/package.json b/packages/dataverse-experiments/package.json
index b092add..c309709 100644
--- a/packages/dataverse-experiments/package.json
+++ b/packages/dataverse-experiments/package.json
@@ -18,7 +18,7 @@
     "@types/lodash-es": "^4.17.4",
     "@types/node": "^15.6.2",
     "@types/react": "^17.0.9",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   },
   "dependencies": {
     "lodash-es": "^4.17.21"
diff --git a/packages/dataverse/package.json b/packages/dataverse/package.json
index d524ffb..931a360 100644
--- a/packages/dataverse/package.json
+++ b/packages/dataverse/package.json
@@ -35,7 +35,7 @@
     "esbuild": "^0.12.15",
     "esbuild-register": "^2.5.0",
     "npm-run-all": "^4.1.5",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   },
   "dependencies": {
     "lodash-es": "^4.17.21"
diff --git a/packages/dataverse/src/dataverse.test.ts b/packages/dataverse/src/dataverse.test.ts
index 3d719f8..079174e 100644
--- a/packages/dataverse/src/dataverse.test.ts
+++ b/packages/dataverse/src/dataverse.test.ts
@@ -696,7 +696,7 @@ describe(`The exhaustive guide to dataverse`, () => {
 
       // Let's create a function that will set a property of an object by a pointer, similar to `lodash.set()`.
       // The function will take the root object, the pointer, and the new value.
-      function setByPointer<Root, Value>(
+      function setByPointer<Root extends {}, Value>(
         root: Root,
         getPointer: (ptr: Pointer<Root>) => Pointer<Value>,
         newValue: Value,
diff --git a/packages/dataverse/src/prism/prism.ts b/packages/dataverse/src/prism/prism.ts
index 856547b..bed9c3e 100644
--- a/packages/dataverse/src/prism/prism.ts
+++ b/packages/dataverse/src/prism/prism.ts
@@ -233,7 +233,7 @@ class PrismInstance<V> implements Prism<V> {
     }
 
     // let's cache the last value so we don't call the listener if the value hasn't changed
-    let lastValue =
+    let lastValue: V | typeof emptyObject =
       // use an empty object as the initial value so that the listener is called on the first tick.
       // if we were to use, say, undefined, and this.getValue() also returned undefined, the listener
       // would never be called.
diff --git a/packages/playground/package.json b/packages/playground/package.json
index 4dc4e97..550aa0d 100644
--- a/packages/playground/package.json
+++ b/packages/playground/package.json
@@ -39,7 +39,7 @@
     "styled-components": "^5.3.11",
     "theatric": "workspace:*",
     "three": "^0.155.0",
-    "typescript": "4.6.4",
+    "typescript": "5.1.6",
     "vite": "^4.3.9"
   }
 }
diff --git a/packages/r3f/package.json b/packages/r3f/package.json
index 9393a2b..cd31bfa 100644
--- a/packages/r3f/package.json
+++ b/packages/r3f/package.json
@@ -73,7 +73,7 @@
     "styled-components": "^5.3.11",
     "three": "0.155.0",
     "three-stdlib": "^2.24.1",
-    "typescript": "4.6.4",
+    "typescript": "5.1.6",
     "zustand": "^3.5.1"
   },
   "peerDependencies": {
diff --git a/packages/react/package.json b/packages/react/package.json
index 02eface..dacfcc7 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -37,7 +37,7 @@
     "esbuild": "^0.12.15",
     "esbuild-register": "^2.5.0",
     "npm-run-all": "^4.1.5",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   },
   "dependencies": {
     "@theatre/dataverse": "workspace:*",
diff --git a/packages/theatric/package.json b/packages/theatric/package.json
index c67e65b..5d74302 100644
--- a/packages/theatric/package.json
+++ b/packages/theatric/package.json
@@ -37,7 +37,7 @@
     "esbuild-register": "^2.5.0",
     "lodash-es": "^4.17.21",
     "npm-run-all": "^4.1.5",
-    "typescript": "4.6.4"
+    "typescript": "5.1.6"
   },
   "dependencies": {
     "@theatre/core": "workspace:*",
diff --git a/theatre/package.json b/theatre/package.json
index 75714b0..cf90b7c 100644
--- a/theatre/package.json
+++ b/theatre/package.json
@@ -82,7 +82,7 @@
     "shallowequal": "^1.1.0",
     "styled-components": "^5.3.11",
     "timing-function": "^0.2.3",
-    "typescript": "4.6.4",
+    "typescript": "5.1.6",
     "uuid": "^8.3.2"
   },
   "dependencies": {
diff --git a/theatre/shared/src/_logger/logger.test-helpers.ts b/theatre/shared/src/_logger/logger.test-helpers.ts
index 4b42063..1262eae 100644
--- a/theatre/shared/src/_logger/logger.test-helpers.ts
+++ b/theatre/shared/src/_logger/logger.test-helpers.ts
@@ -129,7 +129,7 @@ function expectLastCalledWith(
   }
 }
 
-function objMap<T, U>(
+function objMap<T extends {}, U>(
   template: T,
   eachEntry: <P extends keyof T>(entry: [name: P, value: T[P]]) => U,
 ): {[P in keyof T]: U} {
diff --git a/theatre/shared/src/utils/deepMergeWithCache.ts b/theatre/shared/src/utils/deepMergeWithCache.ts
index a859ecf..935150c 100644
--- a/theatre/shared/src/utils/deepMergeWithCache.ts
+++ b/theatre/shared/src/utils/deepMergeWithCache.ts
@@ -72,7 +72,11 @@ export default function deepMergeWithCache<T extends SerializableMap>(
     // @ts-ignore @todo
     merged[key] =
       typeof valueInOverride === 'object' && typeof valueInBase === 'object'
-        ? deepMergeWithCache(valueInBase, valueInOverride, cache)
+        ? deepMergeWithCache(
+            valueInBase as SerializableMap,
+            valueInOverride,
+            cache,
+          )
         : valueInOverride === undefined
         ? valueInBase
         : valueInOverride
diff --git a/theatre/shared/src/utils/minimalOverride.ts b/theatre/shared/src/utils/minimalOverride.ts
index 758d746..5b89256 100644
--- a/theatre/shared/src/utils/minimalOverride.ts
+++ b/theatre/shared/src/utils/minimalOverride.ts
@@ -60,7 +60,7 @@ function typeOfValue(v: unknown): ValueType {
  * })
  * ```
  */
-export default function minimalOverride<T>(base: T, override: T): T {
+export default function minimalOverride<T extends {}>(base: T, override: T): T {
   const typeofOverride = typeOfValue(override)
   if (typeofOverride === ValueType.Opaque) {
     return override
diff --git a/theatre/studio/src/StudioStore/createTransactionPrivateApi.ts b/theatre/studio/src/StudioStore/createTransactionPrivateApi.ts
index 9639b70..4126d13 100644
--- a/theatre/studio/src/StudioStore/createTransactionPrivateApi.ts
+++ b/theatre/studio/src/StudioStore/createTransactionPrivateApi.ts
@@ -35,7 +35,7 @@ function cloneDeepSerializableAndPrune<T>(v: T): T | undefined {
   } else if (isPlainObject(v)) {
     const cloned: $IntentionalAny = {}
     let clonedAtLeastOneProp = false
-    for (const [key, val] of Object.entries(v)) {
+    for (const [key, val] of Object.entries(v as {})) {
       const clonedVal = cloneDeepSerializableAndPrune(val)
       if (clonedVal !== undefined) {
         cloned[key] = val
@@ -169,7 +169,7 @@ export default function createTransactionPrivateApi(
               const pathToPropInProvidedValue =
                 pathToProp.slice(lengthOfTopPointer)
 
-              const v = getDeep(_value, pathToPropInProvidedValue)
+              const v = getDeep(_value as {}, pathToPropInProvidedValue)
               if (typeof v !== 'undefined') {
                 setStaticOrKeyframeProp(v, primitivePropConfig, pathToProp)
               } else {
diff --git a/theatre/studio/src/css.tsx b/theatre/studio/src/css.tsx
index 302f114..0b441c6 100644
--- a/theatre/studio/src/css.tsx
+++ b/theatre/studio/src/css.tsx
@@ -95,7 +95,7 @@ export const ProvideStyles: React.FC<{
   )
 }
 
-export function withStyledShadow<Props>(
+export function withStyledShadow<Props extends {}>(
   Comp: React.ComponentType<Props>,
 ): React.ComponentType<Props> {
   return (props) => (
diff --git a/theatre/studio/src/store/stateEditors.ts b/theatre/studio/src/store/stateEditors.ts
index 528cf66..6fa9414 100644
--- a/theatre/studio/src/store/stateEditors.ts
+++ b/theatre/studio/src/store/stateEditors.ts
@@ -32,6 +32,7 @@ import type {
   IRange,
   SerializableMap,
   SerializablePrimitive,
+  SerializableValue,
 } from '@theatre/shared/utils/types'
 import {current} from 'immer'
 import findLastIndex from 'lodash-es/findLastIndex'
@@ -773,7 +774,7 @@ namespace stateEditors {
            * Sets a keyframe at the exact specified position.
            * Any position snapping should be done by the caller.
            */
-          export function setKeyframeAtPosition<T>(
+          export function setKeyframeAtPosition<T extends SerializableValue>(
             p: WithoutSheetInstance<SheetObjectAddress> & {
               trackId: SequenceTrackId
               position: number
diff --git a/theatre/studio/src/utils/derive-utils.tsx b/theatre/studio/src/utils/derive-utils.tsx
index f185f8a..a62720f 100644
--- a/theatre/studio/src/utils/derive-utils.tsx
+++ b/theatre/studio/src/utils/derive-utils.tsx
@@ -1,7 +1,7 @@
 import {isPrism, prism, val} from '@theatre/dataverse'
 import type {Prism, Pointer} from '@theatre/dataverse'
 import {usePrismInstance} from '@theatre/react'
-import type {$IntentionalAny} from '@theatre/shared/utils/types'
+import type {$FixMe, $IntentionalAny} from '@theatre/shared/utils/types'
 import React, {useMemo, useRef} from 'react'
 import {invariant} from './invariant'
 
@@ -100,5 +100,5 @@ export function deriver<Props extends {}>(
 
   finalComp.displayName = `deriver(${Component.displayName})`
 
-  return finalComp
+  return finalComp as $FixMe
 }
diff --git a/theatre/studio/src/utils/redux/configureStore.ts b/theatre/studio/src/utils/redux/configureStore.ts
index fbe46cd..c5d7f6f 100644
--- a/theatre/studio/src/utils/redux/configureStore.ts
+++ b/theatre/studio/src/utils/redux/configureStore.ts
@@ -7,12 +7,14 @@ import identity from 'lodash-es/identity'
 import type {Store} from 'redux'
 import {compose, createStore} from 'redux'
 
-interface Conf<State> {
+interface Conf<State extends {}> {
   rootReducer: ReduxReducer<State>
   devtoolsOptions?: $FixMe
 }
 
-export default function configureStore<State>(conf: Conf<State>): Store<State> {
+export default function configureStore<State extends {}>(
+  conf: Conf<State>,
+): Store<State> {
   // const middlewares: $FixMe[] = []
   const enhancers = []
 
diff --git a/theatre/studio/src/utils/renderInPortalInContext.tsx b/theatre/studio/src/utils/renderInPortalInContext.tsx
index 7bce0c7..40b3664 100644
--- a/theatre/studio/src/utils/renderInPortalInContext.tsx
+++ b/theatre/studio/src/utils/renderInPortalInContext.tsx
@@ -22,7 +22,7 @@ let lastId = 1
 
 export const getMounter = () => {
   const id = lastId++
-  function mountOrRender<Props>(
+  function mountOrRender<Props extends {}>(
     comp: React.ComponentType<Props>,
     props: Props,
     portalNode: HTMLElement,
diff --git a/tsconfig.base.json b/tsconfig.base.json
index d595248..c84b17b 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -8,7 +8,6 @@
     "target": "ESNext",
     "lib": ["es2017", "dom", "ESNext"],
     "isolatedModules": true,
-    "importsNotUsedAsValues": "error",
     "noFallthroughCasesInSwitch": true,
     "jsx": "react",
     "skipLibCheck": true,
diff --git a/yarn.lock b/yarn.lock
index 06e518e..3c9d0e4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5672,7 +5672,7 @@ __metadata:
     parcel-bundler: ^1.12.5
     react: ^17.0.2
     react-dom: ^17.0.2
-    typescript: 4.6.4
+    typescript: 5.1.6
   languageName: unknown
   linkType: soft
 
@@ -7670,7 +7670,7 @@ __metadata:
     esbuild: ^0.12.15
     esbuild-register: ^2.5.0
     npm-run-all: ^4.1.5
-    typescript: 4.6.4
+    typescript: 5.1.6
   peerDependencies:
     "@theatre/core": "*"
     "@theatre/studio": "*"
@@ -7729,7 +7729,7 @@ __metadata:
     "@types/node": ^15.6.2
     "@types/react": ^17.0.9
     lodash-es: ^4.17.21
-    typescript: 4.6.4
+    typescript: 5.1.6
   languageName: unknown
   linkType: soft
 
@@ -7745,7 +7745,7 @@ __metadata:
     esbuild-register: ^2.5.0
     lodash-es: ^4.17.21
     npm-run-all: ^4.1.5
-    typescript: 4.6.4
+    typescript: 5.1.6
   languageName: unknown
   linkType: soft
 
@@ -7779,7 +7779,7 @@ __metadata:
     styled-components: ^5.3.11
     three: 0.155.0
     three-stdlib: ^2.24.1
-    typescript: 4.6.4
+    typescript: 5.1.6
     zustand: ^3.5.1
   peerDependencies:
     "@react-three/fiber": ^8.13.6
@@ -7807,7 +7807,7 @@ __metadata:
     lodash-es: ^4.17.21
     npm-run-all: ^4.1.5
     queue-microtask: ^1.2.3
-    typescript: 4.6.4
+    typescript: 5.1.6
   peerDependencies:
     react: "*"
     react-dom: "*"
@@ -11438,7 +11438,7 @@ __metadata:
     "@types/react": ^18.0.25
     esbuild: ^0.15.15
     esbuild-register: ^3.4.1
-    typescript: 4.6.4
+    typescript: 5.1.6
   languageName: unknown
   linkType: soft
 
@@ -25055,7 +25055,7 @@ fsevents@^1.2.7:
     styled-components: ^5.3.11
     theatric: "workspace:*"
     three: ^0.155.0
-    typescript: 4.6.4
+    typescript: 5.1.6
     vite: ^4.3.9
   languageName: unknown
   linkType: soft
@@ -31180,7 +31180,7 @@ fsevents@^1.2.7:
     lint-staged: ^13.0.3
     node-gyp: ^9.1.0
     prettier: ^2.3.2
-    typescript: 4.6.4
+    typescript: 5.1.6
     yaml: ^2.3.1
   languageName: unknown
   linkType: soft
@@ -31253,7 +31253,7 @@ fsevents@^1.2.7:
     shallowequal: ^1.1.0
     styled-components: ^5.3.11
     timing-function: ^0.2.3
-    typescript: 4.6.4
+    typescript: 5.1.6
     uuid: ^8.3.2
   languageName: unknown
   linkType: soft
@@ -31274,7 +31274,7 @@ fsevents@^1.2.7:
     esbuild-register: ^2.5.0
     lodash-es: ^4.17.21
     npm-run-all: ^4.1.5
-    typescript: 4.6.4
+    typescript: 5.1.6
   peerDependencies:
     react: "*"
   languageName: unknown
@@ -31973,13 +31973,13 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
-"typescript@npm:4.6.4, typescript@npm:~4.6.3":
-  version: 4.6.4
-  resolution: "typescript@npm:4.6.4"
+"typescript@npm:5.1.6":
+  version: 5.1.6
+  resolution: "typescript@npm:5.1.6"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: e7bfcc39cd4571a63a54e5ea21f16b8445268b9900bf55aee0e02ad981be576acc140eba24f1af5e3c1457767c96cea6d12861768fb386cf3ffb34013718631a
+  checksum: b2f2c35096035fe1f5facd1e38922ccb8558996331405eb00a5111cc948b2e733163cc22fab5db46992aba7dd520fff637f2c1df4996ff0e134e77d3249a7350
   languageName: node
   linkType: hard
 
@@ -31993,6 +31993,16 @@ fsevents@^1.2.7:
   languageName: node
   linkType: hard
 
+"typescript@npm:~4.6.3":
+  version: 4.6.4
+  resolution: "typescript@npm:4.6.4"
+  bin:
+    tsc: bin/tsc
+    tsserver: bin/tsserver
+  checksum: e7bfcc39cd4571a63a54e5ea21f16b8445268b9900bf55aee0e02ad981be576acc140eba24f1af5e3c1457767c96cea6d12861768fb386cf3ffb34013718631a
+  languageName: node
+  linkType: hard
+
 "uglify-js@npm:^3.1.4":
   version: 3.15.5
   resolution: "uglify-js@npm:3.15.5"