diff --git a/keyserver/src/database/migration-config.js b/keyserver/src/database/migration-config.js
--- a/keyserver/src/database/migration-config.js
+++ b/keyserver/src/database/migration-config.js
@@ -139,6 +139,14 @@
       ]);
     },
   ],
+  [
+    14,
+    async () => {
+      await dbQuery(SQL`
+        ALTER TABLE cookies MODIFY COLUMN social_proof mediumtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL;
+      `);
+    },
+  ],
 ]);
 const newDatabaseVersion: number = Math.max(...migrations.keys());
 
diff --git a/keyserver/src/database/setup-db.js b/keyserver/src/database/setup-db.js
--- a/keyserver/src/database/setup-db.js
+++ b/keyserver/src/database/setup-db.js
@@ -35,7 +35,7 @@
         versions json DEFAULT NULL,
         device_id varchar(255) DEFAULT NULL,
         public_key varchar(255) DEFAULT NULL,
-        social_proof varchar(255) DEFAULT NULL,
+        social_proof mediumtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL,
         \`primary\` TINYINT(1) DEFAULT NULL
       ) ENGINE=InnoDB DEFAULT CHARSET=latin1;