diff --git a/package-lock.json b/package-lock.json
index 6f0bfbb..5d75270 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9424,7 +9424,7 @@
     },
     "packages/networks/cardano-koios": {
       "name": "@rosen-chains/cardano-koios-network",
-      "version": "3.1.1",
+      "version": "3.1.2",
       "license": "GPL-3.0",
       "dependencies": {
         "@emurgo/cardano-serialization-lib-nodejs": "^11.3.1",
diff --git a/packages/networks/cardano-koios/lib/CardanoKoiosNetwork.ts b/packages/networks/cardano-koios/lib/CardanoKoiosNetwork.ts
index 835b53c..9c72751 100644
--- a/packages/networks/cardano-koios/lib/CardanoKoiosNetwork.ts
+++ b/packages/networks/cardano-koios/lib/CardanoKoiosNetwork.ts
@@ -86,7 +86,8 @@ class CardanoKoiosNetwork extends AbstractCardanoNetwork {
           )}`
         );
         const confirmation = res[0].num_confirmations;
-        if (confirmation) return Number(confirmation);
+        if (confirmation !== undefined && confirmation !== null)
+          return Number(confirmation);
         return -1;
       })
       .catch((e) => {
diff --git a/packages/networks/cardano-koios/package.json b/packages/networks/cardano-koios/package.json
index cee5b5b..681e38a 100644
--- a/packages/networks/cardano-koios/package.json
+++ b/packages/networks/cardano-koios/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rosen-chains/cardano-koios-network",
-  "version": "3.1.1",
+  "version": "3.1.2",
   "description": "cardano koios network package for rosen cardano chain",
   "main": "dist/lib/index.js",
   "types": "dist/lib/index.d.ts",