diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53f20f86..7a0dadeb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## v0.21.1 (2024-03-03)
+
+### Fix
+
+- test stderr and stdout for null
+
 ## v0.21.0 (2024-03-02)
 
 ### Feat
diff --git a/package-lock.json b/package-lock.json
index 46341886..67605559 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "languagetool-linter",
-  "version": "0.21.0",
+  "version": "0.21.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "languagetool-linter",
-      "version": "0.21.0",
+      "version": "0.21.1",
       "license": "Apache-2.0",
       "dependencies": {
         "annotatedtext-rehype": "^0.6.0",
diff --git a/package.json b/package.json
index ea5e92b9..8f8f7c2e 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "languagetool-linter",
   "displayName": "LanguageTool Linter",
   "description": "LanguageTool integration for VS Code.",
-  "version": "0.21.0",
+  "version": "0.21.1",
   "engines": {
     "vscode": "^1.57.0"
   },