diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 658f302..a99a3d8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
       run: |
         sudo apt update
         sudo apt install -y --no-install-recommends curl ca-certificates patch make
-        wasi_sdk_url='https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-$WAS_SDK_VERSION/wasi-sdk-$WAS_SDK_VERSION_FULL-linux.tar.gz'
+        wasi_sdk_url="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-$WAS_SDK_VERSION/wasi-sdk-$WAS_SDK_VERSION_FULL-linux.tar.gz"
         sudo curl -L $wasi_sdk_url|tar zxf - -C /opt
         sudo mv /opt/wasi-sdk-$WAS_SDK_VERSION_FULL /opt/wasi-sdk
         echo "/opt/wasi-sdk/bin" >> $GITHUB_PATH