diff --git a/.circleci/scripts/firefox-download.sh b/.circleci/scripts/firefox-download.sh
index 768f1c048..64f0c74e3 100755
--- a/.circleci/scripts/firefox-download.sh
+++ b/.circleci/scripts/firefox-download.sh
@@ -5,7 +5,7 @@ then
     echo "Firefox found. No need to download"
 else
     FIREFOX_VERSION="61.0.1"
-    FIREFOX_BINARY="firefox-${!FIREFOX_VERSION}.tar.bz2"
+    FIREFOX_BINARY="firefox-$FIREFOX_VERSION.tar.bz2"
     echo "Downloading firefox..."
     wget "https://ftp.mozilla.org/pub/firefox/releases/$FIREFOX_VERSION/linux-x86_64/en-US/$FIREFOX_BINARY" \
     && tar xjf "$FIREFOX_BINARY"