diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2c6ec2fd166d40e9f3a976560f3b5a6adb1d6860..1e0af90966c800d30e3ed75858f4720e25efcf84 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,8 +20,8 @@ include( SetupXercesC )
 include( SetupJSON )
 
 # Find the externals needed by the project.
-find_package( GeoModelCore REQUIRED )
-find_package( GeoModelIO REQUIRED )
+find_package( GeoModelCore 3.2.0 REQUIRED )
+find_package( GeoModelIO 3.2.0 REQUIRED )
 
 # Set up the build of the libraries of the project.
 add_subdirectory( GeoModelXMLParser )