diff --git a/zero-gravity/zerog.Dockerfile b/zero-gravity/zerog.Dockerfile
index b8096cdc..687fafbb 100644
--- a/zero-gravity/zerog.Dockerfile
+++ b/zero-gravity/zerog.Dockerfile
@@ -9,7 +9,7 @@ RUN chmod +x /usr/local/bin/init.sh
 ARG ZERO_GRAVITY_VERSION
 ARG ZERO_GRAVITY_CHAIN_SPEC
 RUN curl -sL https://github.com/0glabs/0gchain-NG/releases/download/v${ZERO_GRAVITY_VERSION}/${ZERO_GRAVITY_CHAIN_SPEC}-v${ZERO_GRAVITY_VERSION}.tar.gz -o /tmp/${ZERO_GRAVITY_CHAIN_SPEC}-v${ZERO_GRAVITY_VERSION}.tar.gz
-RUN tar -xzf /tmp/${OG_CHAIN_SPEC}-v${OG_VERSION}.tar.gz -C /tmp
+RUN tar -xzf /tmp/${ZERO_GRAVITY_CHAIN_SPEC}-v${ZERO_GRAVITY_VERSION}.tar.gz -C /tmp
 RUN mv /tmp/${ZERO_GRAVITY_CHAIN_SPEC}-v${ZERO_GRAVITY_VERSION} /0g
 
 RUN chmod +x /0g/bin/0gchaind