diff --git a/scripts/update-v1.sh b/scripts/update-v1.sh
index 45751e1..f75a705 100755
--- a/scripts/update-v1.sh
+++ b/scripts/update-v1.sh
@@ -11,10 +11,10 @@ darwin_sha="$(echo "$2" | tr "[:upper:]" "[:lower:]")"
 linux_sha="$(echo "$3" | tr "[:upper:]" "[:lower:]")"
 
 # Replace version
-sed -i "s/version \"[0-9.]*\"/version \"$version\"/g" "../Formula/coder@1.rb"
+sed -i "s/version \"[0-9.]*\"/version \"${version}\"/g" "../Formula/coder@1.rb"
 
 # Update macOS hash
-sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"$darwin_sha\"/1" "../Formula/coder@1.rb"
+sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"${darwin_sha}\"/1" "../Formula/coder@1.rb"
 
 # Update Linux hash
-sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"$linux_sha\"/2" "../Formula/coder@1.rb"
+sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"${linux_sha}\"/2" "../Formula/coder@1.rb"
diff --git a/scripts/update-v2.sh b/scripts/update-v2.sh
index 288312e..30784c3 100755
--- a/scripts/update-v2.sh
+++ b/scripts/update-v2.sh
@@ -12,13 +12,13 @@ darwin_intel_sha="$(echo "$3" | tr "[:upper:]" "[:lower:]")"
 linux_sha="$(echo "$4" | tr "[:upper:]" "[:lower:]")"
 
 # Replace version
-sed -i "s/version \"[0-9.]*\"/version \"$version\"/g" "../Formula/coder.rb"
+sed -i "s/version \"[0-9.]*\"/version \"${version}\"/g" "../Formula/coder.rb"
 
 # Update macOS ARM hash
-sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"$darwin_arm_sha\"/1" "../Formula/coder.rb"
+sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"${darwin_arm_sha}\"/1" "../Formula/coder.rb"
 
 # Update macOS Intel hash
-sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"$darwin_intel_sha\"/2" "../Formula/coder.rb"
+sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"${darwin_intel_sha}\"/2" "../Formula/coder.rb"
 
 # Update Linux hash
-sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"$linux_sha\"/3" "../Formula/coder.rb"
+sed -zi "s/sha256 \"[a-f0-9]*\"/sha256 \"${linux_sha}\"/3" "../Formula/coder.rb"