diff --git a/.changeset/angry-apes-fail.md b/.changeset/angry-apes-fail.md
new file mode 100644
index 0000000..e783079
--- /dev/null
+++ b/.changeset/angry-apes-fail.md
@@ -0,0 +1,5 @@
+---
+"@croz/nrich-form-configuration-core": minor
+---
+
+Add support for merging yup form configurations instead of overriding them in store
diff --git a/libs/form-configuration/core/src/loader/fetch-form-configurations.ts b/libs/form-configuration/core/src/loader/fetch-form-configurations.ts
index e6d2f2c..2ad5d2a 100644
--- a/libs/form-configuration/core/src/loader/fetch-form-configurations.ts
+++ b/libs/form-configuration/core/src/loader/fetch-form-configurations.ts
@@ -15,10 +15,18 @@
  *
  */
 
+import _ from "lodash";
+
 import { FormConfiguration, FormConfigurationConfiguration, FormYupConfiguration } from "../api";
 import { FormConfigurationValidationConverter } from "../converter";
 import { useFormConfigurationStore } from "../store";
 
+const mergeFormYupConfigurationsWithoutDuplicates = (oldFormYupConfiguration: FormYupConfiguration[], newFormYupConfiguration: FormYupConfiguration[]) => {
+  const mergedFormYupConfigurations = [...oldFormYupConfiguration, ...newFormYupConfiguration];
+
+  return _.uniqBy(mergedFormYupConfigurations, "formId");
+};
+
 export const fetchFormConfigurations = async ({ url, requestOptionsResolver, additionalValidatorConverters }: FormConfigurationConfiguration): Promise<FormConfiguration[]> => {
   const formConfigurationValidationConverter = new FormConfigurationValidationConverter(additionalValidatorConverters);
   const additionalOptions = requestOptionsResolver?.() || {};
@@ -40,7 +48,7 @@ export const fetchFormConfigurations = async ({ url, requestOptionsResolver, add
         yupSchema: formConfigurationValidationConverter.convertFormConfigurationToYupSchema(item.constrainedPropertyConfigurationList),
       });
     });
-    useFormConfigurationStore.getState().set(formYupConfigurations);
+    useFormConfigurationStore.getState().set(mergeFormYupConfigurationsWithoutDuplicates(useFormConfigurationStore.getState().formYupConfigurations, formYupConfigurations));
     useFormConfigurationStore.getState().setFormConfigurationLoaded(true);
   }
 
diff --git a/libs/form-configuration/core/test/loader/fetch-form-configurations.test.ts b/libs/form-configuration/core/test/loader/fetch-form-configurations.test.ts
index afda789..82892cf 100644
--- a/libs/form-configuration/core/test/loader/fetch-form-configurations.test.ts
+++ b/libs/form-configuration/core/test/loader/fetch-form-configurations.test.ts
@@ -17,7 +17,7 @@
 
 import { fetchFormConfigurations } from "../../src/loader";
 import { useFormConfigurationStore } from "../../src/store";
-import { mockFormConfigurations, mockValidatorConverters } from "../testutil/form-configuration-generating-util";
+import { mockFormConfigurations, mockFormYupConfigurations, mockValidatorConverters } from "../testutil/form-configuration-generating-util";
 import { setupFormConfigurationServer } from "../testutil/setup-form-configuration-server";
 
 const server = setupFormConfigurationServer();
@@ -49,4 +49,24 @@ describe("@croz/nrich-form-configuration-core/fetch-form-configurations", () =>
     // cleanup
     formConfigurationState.set([]);
   });
+
+  it("should resolve form configurations and add them to store with ignoring duplicates", async () => {
+    // given
+    useFormConfigurationStore.getState().set([mockFormYupConfigurations[0]]);
+
+    // when
+    const response = await fetchFormConfigurations({ url: "/test-url", additionalValidatorConverters: mockValidatorConverters });
+
+    // then
+    expect(response).toHaveLength(2);
+
+    // and when
+    const formConfigurationState = useFormConfigurationStore.getState();
+
+    // then
+    expect(formConfigurationState.formYupConfigurations).toHaveLength(2);
+
+    // cleanup
+    formConfigurationState.set([]);
+  });
 });