diff --git a/src/utils/token.ts b/src/utils/token.ts
index d2bffea..f0ac4d2 100644
--- a/src/utils/token.ts
+++ b/src/utils/token.ts
@@ -62,20 +62,20 @@ export function fetchTokenName(tokenAddress: Address): string {
   return nameValue
 }
 
-export function fetchTokenDecimals(tokenAddress: Address): BigInt {
+export function fetchTokenDecimals(tokenAddress: Address): BigInt | null {
+  let staticTokenDefinition = StaticTokenDefinition.fromAddress(tokenAddress)
+  if(staticTokenDefinition) {
+    return staticTokenDefinition.decimals
+  }
+
   let contract = ERC20.bind(tokenAddress)
   // try types uint8 for decimals
-  let decimalValue: number 
   let decimalResult = contract.try_decimals()
   if (!decimalResult.reverted) {
-    decimalValue = decimalResult.value
-  } else {
-    // try with the static definition
-    let staticTokenDefinition = StaticTokenDefinition.fromAddress(tokenAddress)
-    if(staticTokenDefinition != null) {
-      return staticTokenDefinition.decimals
+    if (decimalResult.value.lt(BigInt.fromI32(255))) {
+      return decimalResult.value
     }
-  }
+  } 
 
-  return BigInt.fromI32(decimalValue as i32)
+  return null
 }
diff --git a/yarn.lock b/yarn.lock
index d219f13..b82c316 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -945,7 +945,14 @@ brace-expansion@^2.0.1:
   dependencies:
     balanced-match "^1.0.0"
 
-braces@^3.0.2, braces@~3.0.2:
+braces@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.3.tgz#490332f40919452272d55a8480adc0c441358789"
+  integrity sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==
+  dependencies:
+    fill-range "^7.1.1"
+
+braces@~3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.2.tgz#3454e1a462ee8d599e236df336cd9ea4f8afe107"
   integrity sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==
@@ -1728,6 +1735,13 @@ fill-range@^7.0.1:
   dependencies:
     to-regex-range "^5.0.1"
 
+fill-range@^7.1.1:
+  version "7.1.1"
+  resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-7.1.1.tgz#44265d3cac07e3ea7dc247516380643754a05292"
+  integrity sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg==
+  dependencies:
+    to-regex-range "^5.0.1"
+
 find-up@^1.0.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-1.1.2.tgz#6b2e9822b1a2ce0a60ab64d610eccad53cb24d0f"
@@ -2767,11 +2781,11 @@ merge2@^1.3.0, merge2@^1.4.1:
   integrity sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==
 
 micromatch@^4.0.4:
-  version "4.0.5"
-  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-4.0.5.tgz#bc8999a7cbbf77cdc89f132f6e467051b49090c6"
-  integrity sha512-DMy+ERcEW2q8Z2Po+WNXuw3c5YaUSFjAO5GsJqfEl7UjvtIuFKO6ZrKvcItdy98dwFI2N1tg3zNIdKaQT+aNdA==
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-4.0.8.tgz#d66fa18f3a47076789320b9b1af32bd86d9fa202"
+  integrity sha512-PXwfBhYu0hBCPw8Dn0E+WDYb7af3dSLVWKi3HGv84IdF4TyFoC0ysxFd0Goxw7nSv4T/PzEJQxsYsEiFCKo2BA==
   dependencies:
-    braces "^3.0.2"
+    braces "^3.0.3"
     picomatch "^2.3.1"
 
 mime-db@1.52.0: