diff --git a/MAINTAINERS.md b/MAINTAINERS.md
index c522bdc..83ce467 100644
--- a/MAINTAINERS.md
+++ b/MAINTAINERS.md
@@ -110,6 +110,11 @@ We need to monitor new releases at https://docs.microsoft.com/en-us/sql/connect/
 The latest stable release of the `ssh2` PHP extension is very old, so we install the latest beta release.
 We should switch to the stable release once it will be available.
 
+## xdiff
+
+The `xdiff` PHP extension uses the LibXDiff library.
+We need to monitor new releases at http://www.xmailserver.org/xdiff-lib.html
+
 ### zookeeper
 
 The latest stable release of the `zookeeper` PHP extension doesn't support PHP 7.3+, so we install the alpha version.
diff --git a/data/supported-extensions b/data/supported-extensions
index 0d88f46..9bb8399 100644
--- a/data/supported-extensions
+++ b/data/supported-extensions
@@ -109,6 +109,7 @@ uuid 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1
 vips 7.0 7.1 7.2 7.3 7.4 8.0 8.1
 wddx 5.5 5.6 7.0 7.1 7.2 7.3
 xdebug 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1
+xdiff 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1
 xhprof 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1
 xlswriter 7.0 7.1 7.2 7.3 7.4 8.0 8.1
 xmldiff 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1
diff --git a/install-php-extensions b/install-php-extensions
index 7cca4bd..b8c698e 100755
--- a/install-php-extensions
+++ b/install-php-extensions
@@ -3244,6 +3244,21 @@ installRemoteModule() {
 				fi
 			fi
 			;;
+		xdiff)
+			if test -z "$installRemoteModule_version"; then
+				if test $PHP_MAJMIN_VERSION -le 506; then
+					installRemoteModule_version=1.5.2
+				fi
+			fi
+			if ! test -f /usr/local/lib/libxdiff.* && ! test -f /usr/lib/libxdiff.* && ! test -f /usr/lib/x86_64*/libxdiff.*; then
+				installRemoteModule_src="$(getPackageSource http://www.xmailserver.org/libxdiff-0.23.tar.gz)"
+				cd -- "$installRemoteModule_src"
+				./configure --disable-shared --disable-dependency-tracking --with-pic
+				make -j$(getProcessorCount)
+				make install
+				cd - >/dev/null
+			fi
+			;;
 		xhprof)
 			if test -z "$installRemoteModule_version"; then
 				if test $PHP_MAJMIN_VERSION -le 506; then