diff --git a/Dockerfile b/Dockerfile
index 41fce03a..ea0a1d9d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,7 @@ ENV LC_ALL "C"
 
 WORKDIR /etc/shlink
 
+# Install required PHP extensions
 RUN \
     # Install mysql and calendar
     docker-php-ext-install -j"$(nproc)" pdo_mysql calendar && \
@@ -21,7 +22,10 @@ RUN \
     docker-php-ext-install -j"$(nproc)" intl && \
     # Install zip and gd
     apk add --no-cache libzip-dev zlib-dev libpng-dev && \
-    docker-php-ext-install -j"$(nproc)" zip gd
+    docker-php-ext-install -j"$(nproc)" zip gd && \
+    # Install gmp
+    apk add --no-cache gmp-dev && \
+    docker-php-ext-install -j"$(nproc)" gmp
 
 # Install sqlsrv driver
 RUN if [ $(uname -m) == "x86_64" ]; then \
diff --git a/data/infra/php.Dockerfile b/data/infra/php.Dockerfile
index 218db4c5..e419ba6b 100644
--- a/data/infra/php.Dockerfile
+++ b/data/infra/php.Dockerfile
@@ -30,6 +30,9 @@ RUN docker-php-ext-install gd
 RUN apk add --no-cache postgresql-dev
 RUN docker-php-ext-install pdo_pgsql
 
+RUN apk add --no-cache gmp-dev
+RUN docker-php-ext-install gmp
+
 # Install APCu extension
 ADD https://pecl.php.net/get/apcu-$APCU_VERSION.tgz /tmp/apcu.tar.gz
 RUN mkdir -p /usr/src/php/ext/apcu\
diff --git a/data/infra/swoole.Dockerfile b/data/infra/swoole.Dockerfile
index 5d8485ab..00d197ba 100644
--- a/data/infra/swoole.Dockerfile
+++ b/data/infra/swoole.Dockerfile
@@ -32,6 +32,9 @@ RUN docker-php-ext-install gd
 RUN apk add --no-cache postgresql-dev
 RUN docker-php-ext-install pdo_pgsql
 
+RUN apk add --no-cache gmp-dev
+RUN docker-php-ext-install gmp
+
 # Install APCu extension
 ADD https://pecl.php.net/get/apcu-$APCU_VERSION.tgz /tmp/apcu.tar.gz
 RUN mkdir -p /usr/src/php/ext/apcu\