diff --git a/common/credential-storage/migrations/20240206120000_add_credential_types.sql b/common/credential-storage/migrations/20240206120000_add_credential_types.sql
index a75acca881..696d6d46a4 100644
--- a/common/credential-storage/migrations/20240206120000_add_credential_types.sql
+++ b/common/credential-storage/migrations/20240206120000_add_credential_types.sql
@@ -12,6 +12,6 @@ CREATE TABLE coconut_credentials
     serialization_revision INTEGER NOT NULL,
     credential_type        TEXT    NOT NULL,
     credential_data        BLOB    NOT NULL,
-    epoch_id               TEXT    NOT NULL,
+    epoch_id               INTEGER NOT NULL,
     consumed               BOOLEAN NOT NULL
 );
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