diff --git a/steamcmd/proton/Dockerfile b/steamcmd/proton/Dockerfile
index ee9f499..b7d390c 100644
--- a/steamcmd/proton/Dockerfile
+++ b/steamcmd/proton/Dockerfile
@@ -13,7 +13,7 @@ RUN         apt install -y alsa-tools libpulse0 pulseaudio libpulse-dev libasoun
 RUN         useradd -d /home/container -m container
 
 # Download Proton GE
-RUN         curl -sLOJ $(curl -s https://api.github.com/repos/GloriousEggroll/proton-ge-custom/releases/latest | grep browser_download_url | cut -d\" -f4 | egrep .tar.gz)
+RUN         curl -sLOJ "$(curl -s https://api.github.com/repos/GloriousEggroll/proton-ge-custom/releases/latest | grep browser_download_url | cut -d\" -f4 | egrep .tar.gz)"
 RUN         tar -xzf GE-Proton*.tar.gz -C /usr/local/bin/ --strip-components=1
 RUN         rm GE-Proton*.*