diff --git a/README.md b/README.md
index 81be803..52499b9 100644
--- a/README.md
+++ b/README.md
@@ -105,7 +105,7 @@ more information.
 If you want to link GEOS statically, use the `static` feature.
 
 The static build uses the GEOS version in the git submodule in`sys/geos-src/source`.
-This is currently GEOS 3.11.3.
+This is currently GEOS 3.12.1.
 
 You will need to have a build environment supported for the static version of
 GEOS. See [GEOS build instructions](https://libgeos.org/usage/download/#build-from-source)
diff --git a/sys/geos-src/source b/sys/geos-src/source
index 17e3cb1..9a5d058 160000
--- a/sys/geos-src/source
+++ b/sys/geos-src/source
@@ -1 +1 @@
-Subproject commit 17e3cb142d2592ce09c4530267ee2fb6ee1c6f79
+Subproject commit 9a5d0587fe62b1551dbee678e2cf6360d292e95b