diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1f95ad4..46f52e7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        smalltalk: [ Pharo64-8.0, Pharo64-7.0, Pharo32-7.0 ]
+        smalltalk: [ Pharo64-9.0, Pharo64-8.0, Pharo64-7.0, Pharo32-7.0 ]
     name: ${{ matrix.smalltalk }}
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/loading-groups.yml b/.github/workflows/loading-groups.yml
index a1da52f..cf262b7 100644
--- a/.github/workflows/loading-groups.yml
+++ b/.github/workflows/loading-groups.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        smalltalk: [ Pharo64-8.0, Pharo64-7.0 ]
+        smalltalk: [ Pharo64-9.0, Pharo64-8.0, Pharo64-7.0 ]
         load-spec: [ deployment, dependent-sunit-extensions, tests, tools, development]
     name: ${{ matrix.smalltalk }} + ${{ matrix.load-spec }}
     steps:
diff --git a/source/Willow-Auth0-Tests/WillowAuth0Demo.class.st b/source/Willow-Auth0-Tests/WillowAuth0Demo.class.st
index c654f6a..1c7c457 100644
--- a/source/Willow-Auth0-Tests/WillowAuth0Demo.class.st
+++ b/source/Willow-Auth0-Tests/WillowAuth0Demo.class.st
@@ -84,7 +84,7 @@ WillowAuth0Demo class >> start [
 	<ignoreForCoverage>
 	self registerAsDevelopmentApplication.
 	( ZnZincServerAdaptor port: 3000 )
-		codec: GRPharoUtf8Codec new;
+		codec: ( GRCodec forEncoding: 'utf8' );
 		start
 ]