diff --git a/science/gis/geos/pspec.xml b/science/gis/geos/pspec.xml
index 133774e9e0..7f9615afa9 100644
--- a/science/gis/geos/pspec.xml
+++ b/science/gis/geos/pspec.xml
@@ -13,7 +13,7 @@
         <IsA>library</IsA>
         <Summary>Geometry engine library for Geographic Information Systems</Summary>
         <Description>GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).</Description>
-        <Archive sha1sum="dbd165752dd4c48d81a84aa51c99d04410d96c67" type="tarbz2">http://download.osgeo.org/geos/geos-3.8.1.tar.bz2</Archive>
+        <Archive sha1sum="26e654352f6a953b75ff0e89c1c421343e051d3a" type="tarbz2">http://download.osgeo.org/geos/geos-3.9.1.tar.bz2</Archive>
         <BuildDependencies>
             <Dependency>swig</Dependency>
             <Dependency>doxygen</Dependency>
@@ -66,6 +66,13 @@
     </Package>
 
     <History>
+        <Update release="10">
+            <Date>2021-06-28</Date>
+            <Version>3.9.1</Version>
+            <Comment>Version bump.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="9">
             <Date>2020-05-18</Date>
             <Version>3.8.1</Version>
@@ -116,4 +123,4 @@
             <Email>ertugrulerata@gmail.com</Email>
         </Update>
     </History>
-</PISI>
\ No newline at end of file
+</PISI>