diff --git a/Dockerfile b/Dockerfile
index 24f2349..0ff44dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,6 +24,7 @@ RUN \
     php81-curl \
     php81-dom \
     php81-gd \
+    php81-iconv \
     php81-ldap \
     php81-mysqlnd \
     php81-pdo_mysql \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 1b5d8f7..25336d2 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -24,6 +24,7 @@ RUN \
     php81-curl \
     php81-dom \
     php81-gd \
+    php81-iconv \
     php81-ldap \
     php81-mysqlnd \
     php81-pdo_mysql \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 74760ac..e462a26 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -24,6 +24,7 @@ RUN \
     php81-curl \
     php81-dom \
     php81-gd \
+    php81-iconv \
     php81-ldap \
     php81-mysqlnd \
     php81-pdo_mysql \