diff --git a/.changeset/cyan-tools-love.md b/.changeset/cyan-tools-love.md
new file mode 100644
index 0000000000..d46a9a409f
--- /dev/null
+++ b/.changeset/cyan-tools-love.md
@@ -0,0 +1,5 @@
+---
+'@adyen/adyen-web': patch
+---
+
+Improvements: add `authorization_token` in the Klarna widget AdditionalDetails state data, so that we are aligned with the API specs.
diff --git a/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx b/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx
index 125f16cbe3..619d6b7963 100644
--- a/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx
+++ b/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx
@@ -58,7 +58,9 @@ export function KlarnaWidget({ sdkData, paymentMethodType, payButton, ...props }
                             data: {
                                 paymentData: props.paymentData,
                                 details: {
-                                    token: res.authorization_token
+                                    // For the backward compatibility we need to pass both 'token' and 'authorization_token'
+                                    token: res.authorization_token,
+                                    authorization_token: res.authorization_token
                                 }
                             }
                         });