diff --git a/action.yml b/action.yml
index 37be449..9c58166 100644
--- a/action.yml
+++ b/action.yml
@@ -44,7 +44,16 @@ runs:
       run: |
         unzip aftman*.zip
         ./aftman self-install
-        echo "$HOME/.aftman/bin" >> $GITHUB_PATH
+      shell: bash
+      
+    - name: Set environment variable
+      if: runner.os == 'Windows'
+      run: echo "$HOME/.aftman/bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+      shell: powershell
+
+    - name: Set environment variable
+      if: runner.os != 'Windows'
+      run: echo "$HOME/.aftman/bin" >> $GITHUB_PATH
       shell: bash
 
     - name: Install tools