diff --git a/package-lock.json b/package-lock.json
index 6234776..f75f348 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -39,7 +39,7 @@
         "@formatjs/cli": "^6.1.1",
         "@formatjs/ts-transformer": "^3.12.0",
         "@fortawesome/fontawesome-free": "^6.4.0",
-        "@open-formulieren/types": "^0.33.0",
+        "@open-formulieren/types": "^0.34.0",
         "@storybook/addon-actions": "^8.3.5",
         "@storybook/addon-essentials": "^8.3.5",
         "@storybook/addon-interactions": "^8.3.5",
@@ -5087,9 +5087,9 @@
       }
     },
     "node_modules/@open-formulieren/types": {
-      "version": "0.33.0",
-      "resolved": "https://registry.npmjs.org/@open-formulieren/types/-/types-0.33.0.tgz",
-      "integrity": "sha512-ALPg3wMviAxmfdXBBfaSkecZH92yfbH+EXUiyByiDo8WtJHGbniiXSV6YHMWvrXFWuKxCTx22St0wl/if0Ojjw==",
+      "version": "0.34.0",
+      "resolved": "https://registry.npmjs.org/@open-formulieren/types/-/types-0.34.0.tgz",
+      "integrity": "sha512-4MGJdllKYqcKMNRvJSTn+wIu8v0LB1dxfYNK5CV+6y751GN/Ss8sbEbfO69nYvO92zFs1b3NgQ63I6pQC8THMg==",
       "dev": true,
       "license": "EUPL-1.2"
     },
@@ -24607,9 +24607,9 @@
       }
     },
     "@open-formulieren/types": {
-      "version": "0.33.0",
-      "resolved": "https://registry.npmjs.org/@open-formulieren/types/-/types-0.33.0.tgz",
-      "integrity": "sha512-ALPg3wMviAxmfdXBBfaSkecZH92yfbH+EXUiyByiDo8WtJHGbniiXSV6YHMWvrXFWuKxCTx22St0wl/if0Ojjw==",
+      "version": "0.34.0",
+      "resolved": "https://registry.npmjs.org/@open-formulieren/types/-/types-0.34.0.tgz",
+      "integrity": "sha512-4MGJdllKYqcKMNRvJSTn+wIu8v0LB1dxfYNK5CV+6y751GN/Ss8sbEbfO69nYvO92zFs1b3NgQ63I6pQC8THMg==",
       "dev": true
     },
     "@pkgjs/parseargs": {
diff --git a/package.json b/package.json
index 38cb9ef..d4272d7 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "@formatjs/cli": "^6.1.1",
     "@formatjs/ts-transformer": "^3.12.0",
     "@fortawesome/fontawesome-free": "^6.4.0",
-    "@open-formulieren/types": "^0.33.0",
+    "@open-formulieren/types": "^0.34.0",
     "@storybook/addon-actions": "^8.3.5",
     "@storybook/addon-essentials": "^8.3.5",
     "@storybook/addon-interactions": "^8.3.5",
diff --git a/src/components/ComponentConfiguration.stories.tsx b/src/components/ComponentConfiguration.stories.tsx
index 8f4b43d..5e930ef 100644
--- a/src/components/ComponentConfiguration.stories.tsx
+++ b/src/components/ComponentConfiguration.stories.tsx
@@ -1626,6 +1626,7 @@ export const Select: Story = {
         clearOnHide: true,
         isSensitiveData: false,
         dataSrc: 'values',
+        dataType: 'string',
         data: {
           values: [
             {
@@ -1726,6 +1727,7 @@ export const Select: Story = {
         clearOnHide: true,
         isSensitiveData: false,
         dataSrc: 'values',
+        dataType: 'string',
         data: {},
         openForms: {
           dataSrc: 'variable',
diff --git a/src/registry/select/edit.tsx b/src/registry/select/edit.tsx
index 388b0f0..e52c98a 100644
--- a/src/registry/select/edit.tsx
+++ b/src/registry/select/edit.tsx
@@ -177,6 +177,7 @@ EditForm.defaultValues = {
   // fixed, this is what itemsExpression results in via the backend. Do not confuse with
   // openForms.dataSrc!
   dataSrc: 'values',
+  dataType: 'string',
   data: {values: [{value: '', label: ''}]},
   // TODO: at some point we can allow an itemsExpression for this too
   // Note: Formio will override this to `null`! So be careful when dealing with