diff --git a/.eslintrc.js b/.eslintrc.js
index d6a599c..27f723d 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -28,6 +28,8 @@ module.exports = {
   rules: {
     'unused-imports/no-unused-imports': 'warn',
     'tsdoc/syntax': 'warn',
+    'no-debugger': 'error',
+
     'no-restricted-imports': [
       'error',
       {
diff --git a/packages/react/src/index.ts b/packages/react/src/index.ts
index 4859ca0..d55d7ee 100644
--- a/packages/react/src/index.ts
+++ b/packages/react/src/index.ts
@@ -346,7 +346,6 @@ export function usePrismInstance<T>(der: Prism<T>, debugLabel?: string): T {
 
   if (process.env.NODE_ENV !== 'production') {
     if (der !== ref.current.der) {
-      debugger
       console.error(
         'Argument `der` in `usePrismInstance(der)` should not change between renders.',
       )
diff --git a/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts b/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts
index e28a61d..b678cea 100644
--- a/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts
+++ b/theatre/core/src/sheetObjects/SheetObjectTemplate.test.ts
@@ -90,7 +90,6 @@ describe(`SheetObjectTemplate`, () => {
         },
       })
 
-      debugger
       const iter = iterateOver(
         obj.template.getMapOfValidSequenceTracks_forStudio(),
       )