diff --git a/depends/install_imagequant.sh b/depends/install_imagequant.sh
index 9dd7742ed..867b31e4d 100755
--- a/depends/install_imagequant.sh
+++ b/depends/install_imagequant.sh
@@ -2,7 +2,7 @@
 # install libimagequant
 
 archive_name=libimagequant
-archive_version=4.3.1
+archive_version=4.3.3
 
 archive=$archive_name-$archive_version
 
diff --git a/docs/installation/building-from-source.rst b/docs/installation/building-from-source.rst
index 7f7dfa6ff..fc02bb382 100644
--- a/docs/installation/building-from-source.rst
+++ b/docs/installation/building-from-source.rst
@@ -68,7 +68,7 @@ Many of Pillow's features require external libraries:
 
 * **libimagequant** provides improved color quantization
 
-  * Pillow has been tested with libimagequant **2.6-4.3.1**
+  * Pillow has been tested with libimagequant **2.6-4.3.3**
   * Libimagequant is licensed GPLv3, which is more restrictive than
     the Pillow license, therefore we will not be distributing binaries
     with libimagequant support enabled.