diff --git a/.github/workflows/new-release-branch.yaml b/.github/workflows/new-release-branch.yaml
index 8cb80522ae283..6c07e96bbbbc9 100644
--- a/.github/workflows/new-release-branch.yaml
+++ b/.github/workflows/new-release-branch.yaml
@@ -22,7 +22,7 @@ jobs:
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' src/compiler/corePublic.ts
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/typescript.d.ts
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/tsserverlibrary.d.ts
-        sed -i -e 's/const version = `${versionMajorMinor}.0-.*`/const version = `${versionMajorMinor}.0-${{ github.event.client_payload.core_tag || 'dev' }}`/g' src/compiler/corePublic.ts
+        sed -i -e 's/const version\(: string\)\{0,1\} = `${versionMajorMinor}.0-.*`/const version = `${versionMajorMinor}.0-${{ github.event.client_payload.core_tag || 'dev' }}`/g' src/compiler/corePublic.ts
         npm ci
         gulp LKG
         npm test
diff --git a/.github/workflows/set-version.yaml b/.github/workflows/set-version.yaml
index f337d5b58f472..d5bd8faa83438 100644
--- a/.github/workflows/set-version.yaml
+++ b/.github/workflows/set-version.yaml
@@ -28,7 +28,7 @@ jobs:
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' src/compiler/corePublic.ts
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/typescript.d.ts
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/tsserverlibrary.d.ts
-        sed -i -e 's/const version = .*;/const version = "${{ github.event.client_payload.package_version }}" as string;/g' src/compiler/corePublic.ts
+        sed -i -e 's/const version\(: string\)\{0,1\} = .*;/const version = "${{ github.event.client_payload.package_version }}" as string;/g' src/compiler/corePublic.ts
         npm ci
         gulp LKG
         npm test