diff --git a/packages/utils/src/CanceledPromiseError.js b/packages/utils/src/CanceledPromiseError.ts
similarity index 100%
rename from packages/utils/src/CanceledPromiseError.js
rename to packages/utils/src/CanceledPromiseError.ts
diff --git a/packages/utils/src/InvalidMetadataError.js b/packages/utils/src/InvalidMetadataError.ts
similarity index 100%
rename from packages/utils/src/InvalidMetadataError.js
rename to packages/utils/src/InvalidMetadataError.ts
diff --git a/packages/utils/src/TimeoutError.js b/packages/utils/src/TimeoutError.ts
similarity index 100%
rename from packages/utils/src/TimeoutError.js
rename to packages/utils/src/TimeoutError.ts
diff --git a/packages/utils/src/ValidationError.js b/packages/utils/src/ValidationError.ts
similarity index 100%
rename from packages/utils/src/ValidationError.js
rename to packages/utils/src/ValidationError.ts