diff --git a/javascript/packages/highlighter/package.json b/javascript/packages/highlighter/package.json
index 17dc55f20..84d587583 100644
--- a/javascript/packages/highlighter/package.json
+++ b/javascript/packages/highlighter/package.json
@@ -49,7 +49,8 @@
   "dependencies": {
     "@herb-tools/core": "0.10.3",
     "@herb-tools/node-wasm": "0.10.3",
-    "ansi_up": "^6.0.6"
+    "ansi_up": "^6.0.6",
+    "dedent": "^1.7.2"
   },
   "files": [
     "package.json",
diff --git a/javascript/packages/printer/package.json b/javascript/packages/printer/package.json
index 952ac8e62..fdea97151 100644
--- a/javascript/packages/printer/package.json
+++ b/javascript/packages/printer/package.json
@@ -40,6 +40,7 @@
     "@herb-tools/config": "0.10.3",
     "@herb-tools/core": "0.10.3",
     "@herb-tools/node-wasm": "0.10.3",
+    "dedent": "^1.7.2",
     "tinyglobby": "^0.2.15"
   },
   "files": [