diff --git a/.changeset/eighty-starfishes-joke.md b/.changeset/eighty-starfishes-joke.md
new file mode 100644
index 00000000..daf0ed86
--- /dev/null
+++ b/.changeset/eighty-starfishes-joke.md
@@ -0,0 +1,5 @@
+---
+'ko': patch
+---
+
+support immer optionalChaining
diff --git a/packages/ko/src/webpack/loaders/script.ts b/packages/ko/src/webpack/loaders/script.ts
index bd300f3d..c9807819 100644
--- a/packages/ko/src/webpack/loaders/script.ts
+++ b/packages/ko/src/webpack/loaders/script.ts
@@ -32,6 +32,8 @@ class Script {
             return true;
           } else if (input.includes('antlr4ng')) {
             return true;
+          } else if (input.includes('immer')) {
+            return true;
           } else if (input.includes('node_modules')) {
             return false;
           } else {