diff --git a/scripts/build-crx.sh b/scripts/build-crx.sh
index 80359e1..ff58532 100755
--- a/scripts/build-crx.sh
+++ b/scripts/build-crx.sh
@@ -15,7 +15,7 @@ cd ./dist-zip
 zip=`ls | grep chrome.zip`
 name="${name%.*}"
 crx="$name.crx"
-key="../keys/chrome-nightly.pub"
+key="../keys/chrome-nightly.pem"
 pub="$name.pub"
 sig="$name.sig"
 trap 'rm -f "$pub" "$sig" "$zip"' EXIT