diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 23ce5296f..618412d91 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -278,7 +278,7 @@ jobs:
 
       - uses: actions/setup-python@v5.3.0
         with:
-          python-version: 3.7
+          python-version: 3.10.16
 
       - uses: actions/cache@v4.2.0
         with:
diff --git a/src/main/java/de/adorsys/keycloak/config/provider/KeycloakProvider.java b/src/main/java/de/adorsys/keycloak/config/provider/KeycloakProvider.java
index 20be19461..d5648bfef 100644
--- a/src/main/java/de/adorsys/keycloak/config/provider/KeycloakProvider.java
+++ b/src/main/java/de/adorsys/keycloak/config/provider/KeycloakProvider.java
@@ -28,6 +28,7 @@
 import org.jboss.resteasy.client.jaxrs.ResteasyClient;
 import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;
 import org.jboss.resteasy.client.jaxrs.internal.BasicAuthentication;
+import org.keycloak.admin.client.JacksonProvider;
 import org.keycloak.admin.client.Keycloak;
 import org.keycloak.admin.client.KeycloakBuilder;
 import org.slf4j.Logger;
@@ -76,6 +77,7 @@ private KeycloakProvider(KeycloakConfigProperties properties) {
     public Keycloak getInstance() {
         if (keycloak == null || resteasyClient == null || keycloak.isClosed() || resteasyClient.isClosed()) {
             resteasyClient = resteasyClientSupplier.get();
+            resteasyClient.register(JacksonProvider.class);
             keycloak = createKeycloak();
 
             checkServerVersion();