diff --git a/Dockerfile b/Dockerfile
index df8603430..fe4b05ede 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ ENV NODE_ENV=production
 
 WORKDIR /misskey
 
-ENV BUILD_DEPS autoconf automake file g++ gcc libc-dev libtool make nasm pkgconfig python3 zlib-dev git
+ENV BUILD_DEPS=autoconf automake file g++ gcc libc-dev libtool make nasm pkgconfig python3 zlib-dev git
 
 FROM base AS builder