diff --git a/4.1/php7.4/apache/Dockerfile b/4.1/php7.4/apache/Dockerfile
index ff8aaef..fbbf43a 100644
--- a/4.1/php7.4/apache/Dockerfile
+++ b/4.1/php7.4/apache/Dockerfile
@@ -21,6 +21,7 @@ RUN set -ex; \
 	apt-get install -y --no-install-recommends \
 		libbz2-dev \
 		libgmp-dev \
+		libicu-dev \
 		libjpeg-dev \
 		libldap2-dev \
 		libmcrypt-dev \
@@ -37,6 +38,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
+		intl \
 		ldap \
 		mysqli \
 		pdo_mysql \
diff --git a/4.1/php7.4/fpm-alpine/Dockerfile b/4.1/php7.4/fpm-alpine/Dockerfile
index 8b9c8c5..309c9e4 100644
--- a/4.1/php7.4/fpm-alpine/Dockerfile
+++ b/4.1/php7.4/fpm-alpine/Dockerfile
@@ -21,6 +21,7 @@ RUN set -ex; \
 		autoconf \
 		bzip2-dev \
 		gmp-dev \
+		icu-dev \
 		libjpeg-turbo-dev \
 		libmcrypt-dev \
 		libmemcached-dev \
@@ -37,6 +38,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
+		intl \
 		ldap \
 		mysqli \
 		pdo_mysql \
diff --git a/4.1/php7.4/fpm/Dockerfile b/4.1/php7.4/fpm/Dockerfile
index 3c43af3..6de42b5 100644
--- a/4.1/php7.4/fpm/Dockerfile
+++ b/4.1/php7.4/fpm/Dockerfile
@@ -19,6 +19,7 @@ RUN set -ex; \
 	apt-get install -y --no-install-recommends \
 		libbz2-dev \
 		libgmp-dev \
+		libicu-dev \
 		libjpeg-dev \
 		libldap2-dev \
 		libmcrypt-dev \
@@ -35,6 +36,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
+		intl \
 		ldap \
 		mysqli \
 		pdo_mysql \
diff --git a/4.1/php8.0/apache/Dockerfile b/4.1/php8.0/apache/Dockerfile
index bec8ad8..f77f123 100644
--- a/4.1/php8.0/apache/Dockerfile
+++ b/4.1/php8.0/apache/Dockerfile
@@ -21,6 +21,7 @@ RUN set -ex; \
 	apt-get install -y --no-install-recommends \
 		libbz2-dev \
 		libgmp-dev \
+		libicu-dev \
 		libjpeg-dev \
 		libldap2-dev \
 		libmcrypt-dev \
@@ -37,6 +38,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
+		intl \
 		ldap \
 		mysqli \
 		pdo_mysql \
diff --git a/4.1/php8.0/fpm-alpine/Dockerfile b/4.1/php8.0/fpm-alpine/Dockerfile
index 41ebba3..fa18166 100644
--- a/4.1/php8.0/fpm-alpine/Dockerfile
+++ b/4.1/php8.0/fpm-alpine/Dockerfile
@@ -21,6 +21,7 @@ RUN set -ex; \
 		autoconf \
 		bzip2-dev \
 		gmp-dev \
+		icu-dev \
 		libjpeg-turbo-dev \
 		libmcrypt-dev \
 		libmemcached-dev \
@@ -37,6 +38,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
+		intl \
 		ldap \
 		mysqli \
 		pdo_mysql \
diff --git a/4.1/php8.0/fpm/Dockerfile b/4.1/php8.0/fpm/Dockerfile
index 1121f77..9111916 100644
--- a/4.1/php8.0/fpm/Dockerfile
+++ b/4.1/php8.0/fpm/Dockerfile
@@ -19,6 +19,7 @@ RUN set -ex; \
 	apt-get install -y --no-install-recommends \
 		libbz2-dev \
 		libgmp-dev \
+		libicu-dev \
 		libjpeg-dev \
 		libldap2-dev \
 		libmcrypt-dev \
@@ -35,6 +36,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
+		intl \
 		ldap \
 		mysqli \
 		pdo_mysql \
diff --git a/Dockerfile.template b/Dockerfile.template
index 3e35e97..953930e 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -26,7 +26,7 @@ RUN set -ex; \
 		autoconf \
 		bzip2-dev \
 		gmp-dev \
-{{ if env.version == "4.0" then ( -}}
+{{ if env.version == "4.1" then ( -}}
 		icu-dev \
 {{ ) else "" end -}}
 		libjpeg-turbo-dev \
@@ -49,7 +49,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
-{{ if env.version == "4.0" then ( -}}
+{{ if env.version == "4.1" then ( -}}
 		intl \
 {{ ) else "" end -}}
 		ldap \
@@ -90,7 +90,7 @@ RUN set -ex; \
 	apt-get install -y --no-install-recommends \
 		libbz2-dev \
 		libgmp-dev \
-{{ if env.version == "4.0" then ( -}}
+{{ if env.version == "4.1" then ( -}}
 		libicu-dev \
 {{ ) else "" end -}}
 		libjpeg-dev \
@@ -113,7 +113,7 @@ RUN set -ex; \
 		bz2 \
 		gd \
 		gmp \
-{{ if env.version == "4.0" then ( -}}
+{{ if env.version == "4.1" then ( -}}
 		intl \
 {{ ) else "" end -}}
 		ldap \