diff --git a/Dockerfile b/Dockerfile
index bce0e4c..45790a2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,6 +29,8 @@ RUN export FLOWNATIVE_LOG_PATH_AND_FILENAME=/dev/stdout \
     && /build.sh build_extension phpredis \
     && /build.sh build_extension xdebug \
     && /build.sh disable_extension xdebug \
+    && /build.sh build_extension mediawiki-php-excimer \
+    && /build.sh disable_extension mediawiki-php-excimer \
     && /build.sh build_extension ssh2 \
     && /build.sh clean
 
diff --git a/README.md b/README.md
index 8b45d66..f341612 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,7 @@ similar mechanism in Kubernetes or your actual platform.
 | PHP_XDEBUG_CLIENT_HOST          | string  |                                        | Configures the IP address or hostname where Xdebug will attempt to connect to when initiating a debugging connection. See Xdebug manual for details |
 | PHP_XDEBUG_MAX_NESTING_LEVEL    | integer | 512                                    | Controls the protection mechanism for infinite recursion protection. See Xdebug manual for details                                                  |
 | PHP_IGBINARY_ENABLE             | boolean | false                                  | Enable or disable the igbinary extension                                                                                                            |
+| PHP_EXCIMER_ENABLE              | boolean | false                                  | Enable or disable the Excimer extension                                                                                                             |
 | PHP_FPM_USER                    | string  | 1000                                   | User id for running PHP (read-only)                                                                                                                 |
 | PHP_FPM_GROUP                   | string  | 1000                                   | Group id for running PHP (read-only)                                                                                                                |
 | PHP_FPM_PORT                    | string  | 9000                                   | Port the PHP-FPM process listens to                                                                                                                 |
diff --git a/root-files/opt/flownative/lib/php-fpm.sh b/root-files/opt/flownative/lib/php-fpm.sh
index 97eaaf0..4d8a9b1 100755
--- a/root-files/opt/flownative/lib/php-fpm.sh
+++ b/root-files/opt/flownative/lib/php-fpm.sh
@@ -43,6 +43,8 @@ export PHP_XDEBUG_MAX_NESTING_LEVEL="${PHP_XDEBUG_MAX_NESTING_LEVEL:-512}"
 
 export PHP_IGBINARY_ENABLE="${PHP_IGBINARY_ENABLE:-false}"
 
+export PHP_EXCIMER_ENABLE="${PHP_EXCIMER_ENABLE:-false}"
+
 export PHP_FPM_USER="1000"
 export PHP_FPM_GROUP="1000"
 export PHP_FPM_PORT="${PHP_FPM_PORT:-9000}"
@@ -96,6 +98,13 @@ php_fpm_initialize() {
         info "PHP-FPM: igbinary is disabled"
     fi
 
+    if is_boolean_yes "${PHP_EXCIMER_ENABLE}"; then
+        info "PHP-FPM: Excimer is enabled"
+        mv "${PHP_CONF_PATH}/conf.d/php-ext-mediawiki-php-excimer.ini.inactive" "${PHP_CONF_PATH}/conf.d/php-ext-mediawiki-php-excimer.ini"
+    else
+        info "PHP-FPM: Excimer is disabled"
+    fi
+
     # Create a file descriptor for the PHP-FPM log output and clean up the log lines a bit:
     exec 4> >(sed -e "s/^\([0-9\/-]* [0-9:,]*\)/\1     OUTPUT PHP-FPM:/")
  }
diff --git a/root-files/opt/flownative/php/build/extensions/mediawiki-php-excimer/mediawiki-php-excimer.sh b/root-files/opt/flownative/php/build/extensions/mediawiki-php-excimer/mediawiki-php-excimer.sh
new file mode 100644
index 0000000..659fce0
--- /dev/null
+++ b/root-files/opt/flownative/php/build/extensions/mediawiki-php-excimer/mediawiki-php-excimer.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+# shellcheck disable=SC2086
+
+# ---------------------------------------------------------------------------------------
+# extensions_mediawiki-php-excimer_prepare() - Prepare the system for this extension
+#
+# @return List of packages
+#
+extensions_mediawiki-php-excimer_prepare() {
+    echo ""
+}
+
+# ---------------------------------------------------------------------------------------
+# extensions_mediawiki-php-excimer_build_packages() - List package names only needed during build time
+#
+# @return List of packages
+#
+extensions_mediawiki-php-excimer_build_packages() {
+    local packages="
+    "
+    echo $packages
+}
+
+# ---------------------------------------------------------------------------------------
+# extensions_mediawiki-php-excimer_runtime_packages() - List package names needed during runtime
+#
+# @return List of packages
+#
+extensions_mediawiki-php-excimer_runtime_packages() {
+    local packages="
+    "
+    echo $packages
+}
+
+# ---------------------------------------------------------------------------------------
+# extensions_mediawiki-php-excimer_url() - Returns the URL leading to the source code archive
+#
+# See https://github.com/wikimedia/mediawiki-php-excimer/tags
+#
+# @return string
+#
+extensions_mediawiki-php-excimer_url() {
+    echo "https://github.com/wikimedia/mediawiki-php-excimer/archive/refs/tags/1.2.3.tar.gz"
+}
+
+# ---------------------------------------------------------------------------------------
+# extensions_mediawiki-php-excimer_configure_arguments() - Returns additional configure arguments
+#
+# @return string
+#
+extensions_mediawiki-php-excimer_configure_arguments() {
+    echo ""
+}