diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 495e9c9a..ea17be68 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,9 +8,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        smalltalk: [ Pharo64-12, Pharo64-11, Pharo64-10, Pharo64-9.0, Pharo64-8.0, Pharo64-7.0, GemStone64-3.7.0, GemStone64-3.6.6, GemStone64-3.5.7, Squeak64-5.3 ]
+        smalltalk: [ Pharo64-12, Pharo64-11, Pharo64-10, Pharo64-9.0, Pharo64-8.0, Pharo64-7.0, GemStone64-3.7.1, GemStone64-3.6.8, GemStone64-3.5.7, Squeak64-5.3 ]
         experimental: [ false ]
         include:
+          - smalltalk: Pharo64-13
+            experimental: true
           - smalltalk: Squeak64-6.0
             experimental: true
     continue-on-error: ${{ matrix.experimental }}
diff --git a/repository/BaselineOfGrease.package/BaselineOfGrease.class/instance/baselinePharo..st b/repository/BaselineOfGrease.package/BaselineOfGrease.class/instance/baselinePharo..st
index e5436d49..f1a39cd3 100644
--- a/repository/BaselineOfGrease.package/BaselineOfGrease.class/instance/baselinePharo..st
+++ b/repository/BaselineOfGrease.package/BaselineOfGrease.class/instance/baselinePharo..st
@@ -52,7 +52,7 @@ baselinePharo: spec
 				group: 'Slime Tests' with: #('Grease-Tests-Slime') ].
 
 	spec
-		for: #(#'pharo10.x' #'pharo11.x' #'pharo12.x')
+		for: #(#'pharo10.x' #'pharo11.x' #'pharo12.x' #'pharo13.x')
 		do: [
 			spec
 				package: 'Grease-Core' with: [ spec includes: #('Grease-Pharo100-Core') ];