diff --git a/Dockerfile b/Dockerfile
index c3fe0cd..14ccfd4 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -53,6 +53,7 @@ RUN \
 	php7-exif \
 	php7-ftp \
 	php7-gd \
+	php7-gmp \
 	php7-iconv \
 	php7-imap \
 	php7-intl \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 559eef2..e1eef2e 100755
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -53,6 +53,7 @@ RUN \
 	php7-exif \
 	php7-ftp \
 	php7-gd \
+	php7-gmp \
 	php7-iconv \
 	php7-imap \
 	php7-intl \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index a247423..29dddf8 100755
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -53,6 +53,7 @@ RUN \
 	php7-exif \
 	php7-ftp \
 	php7-gd \
+	php7-gmp \
 	php7-iconv \
 	php7-imap \
 	php7-intl \