diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index a7238bb7..441c69ed 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -25,6 +25,7 @@ RUN set -ex; \
     apk add --no-cache --virtual .build-deps \
         $PHPIZE_DEPS \
         autoconf \
+        ffmpeg \
         freetype-dev \
         gmp-dev \
         icu-dev \
diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
index 10974d6d..839b8620 100644
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@@ -7,6 +7,7 @@ RUN set -ex; \
     apt-get install -y --no-install-recommends \
         busybox-static \
         bzip2 \
+        ffmpeg \
         libldap-common \
         libmagickcore-7.q16-10-extra \
         rsync \