diff --git a/src/projects/defi/firn-protocol/index.yaml b/src/projects/defi/firn-protocol/index.yaml
index b9b641ac..8600ceea 100644
--- a/src/projects/defi/firn-protocol/index.yaml
+++ b/src/projects/defi/firn-protocol/index.yaml
@@ -6,7 +6,7 @@ token:
   - name: Firn
     symbol: FIRN
     network: Optimism
-    contract_address: 0xb20d84ebFeCdC6821448C7094564a039F0AE5EA4
+    contract_address: "0xb20d84ebFeCdC6821448C7094564a039F0AE5EA4"
 project_type: DeFi
 product_launch_day: 2021/11/06
 technology: