diff --git a/.husky/commit-msg b/.husky/commit-msg
index 850e65b..c005ffb 100755
--- a/.husky/commit-msg
+++ b/.husky/commit-msg
@@ -1,14 +1,2 @@
 #!/bin/sh
-export NVM_DIR="$HOME/.nvm/nvm.sh"
-. "$(dirname $NVM_DIR)/nvm.sh"
-
-export NVM_DIR="$HOME/.nvm"
-a=$(nvm ls | grep 'node')
-b=${a#*(-> }
-v=${b%%[)| ]*}
-
-export PATH="$NVM_DIR/versions/node/$v/bin:$PATH"
-
-. "$(dirname "$0")/_/husky.sh"
-
 npx --no -- commitlint --edit ""
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3437774..e9bb934 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+### [0.3.4](https://github.com/mattjennings/mdsvexamples/compare/0.3.3...0.3.4) (2023-08-04)
+
+### Bug Fixes
+
+- return empty string instead of null for transform mappings ([a3a04ff](https://github.com/mattjennings/mdsvexamples/commit/a3a04ffebeffa846d8edb5754a40a74e2ffd611e))
+
 ### [0.3.3](https://github.com/mattjennings/mdsvex-code-preview/compare/0.3.2...0.3.3) (2022-12-10)
 
 ### [0.3.2](https://github.com/mattjennings/mdsvex-code-preview/compare/0.3.1...0.3.2) (2022-09-14)
diff --git a/package.json b/package.json
index 420caa1..346fec7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mdsvexamples",
-  "version": "0.3.3",
+  "version": "0.3.4",
   "files": [
     "dist"
   ],
diff --git a/src/lib/plugin.js b/src/lib/plugin.js
index cf7683e..4ce4255 100644
--- a/src/lib/plugin.js
+++ b/src/lib/plugin.js
@@ -130,9 +130,8 @@ export default createUnplugin(
 
           return {
             code: ast.generate(tree),
-            /** @type {any} */
             map: {
-              mappings: null
+              mappings: ''
             }
           }
         }
@@ -140,7 +139,7 @@ export default createUnplugin(
         return {
           code,
           map: {
-            mappings: null
+            mappings: ''
           }
         }
       },