diff --git a/depends/install_imagequant.sh b/depends/install_imagequant.sh
index 362ad95a2db..fd6000ee12b 100755
--- a/depends/install_imagequant.sh
+++ b/depends/install_imagequant.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 # install libimagequant
 
-archive=libimagequant-4.1.1
+archive=libimagequant-4.2.0
 
 ./download-and-extract.sh $archive https://raw.githubusercontent.com/python-pillow/pillow-depends/main/$archive.tar.gz
 
diff --git a/docs/installation.rst b/docs/installation.rst
index a254ec8c2ad..ad27b67eeaf 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -181,7 +181,7 @@ Many of Pillow's features require external libraries:
 
 * **libimagequant** provides improved color quantization
 
-  * Pillow has been tested with libimagequant **2.6-4.1.1**
+  * Pillow has been tested with libimagequant **2.6-4.2**
   * Libimagequant is licensed GPLv3, which is more restrictive than
     the Pillow license, therefore we will not be distributing binaries
     with libimagequant support enabled.