diff --git a/docker/Dockerfile b/docker/Dockerfile
index 7ff45501..96c26645 100755
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -68,6 +68,7 @@ RUN ./download.sh swoole ${USE_BACKUP} && \
     ./download.sh xz ${USE_BACKUP} && \
     ./download.sh curl ${USE_BACKUP} && \
     ./download.sh libzip ${USE_BACKUP} && \
+    ./download.sh libiconv ${USE_BACKUP} && \
     ./download-git.sh dixyes/phpmicro phpmicro ${USE_BACKUP}
 
 RUN ./compile-deps.sh
diff --git a/docker/fast-compiler.sh b/docker/fast-compiler.sh
index 0f7db733..cb1b0167 100755
--- a/docker/fast-compiler.sh
+++ b/docker/fast-compiler.sh
@@ -57,6 +57,7 @@ $self_dir/download.sh swoole ${USE_BACKUP} && \
     $self_dir/download.sh protobuf ${USE_BACKUP} && \
     $self_dir/download.sh curl ${USE_BACKUP} && \
     $self_dir/download.sh libzip ${USE_BACKUP} && \
+    $self_dir/download.sh libiconv ${USE_BACKUP} && \
     $self_dir/download-git.sh dixyes/phpmicro phpmicro ${USE_BACKUP} && \
     $self_dir/compile-deps.sh && \
     $self_dir/compile-php.sh $PROMPT_1 $VER_PHP $ALL_EXTENSIONS /dist/