diff --git a/examples/CRISP/client/package.json b/examples/CRISP/client/package.json
index 2f6ab8b2c2..3e0b9e015b 100644
--- a/examples/CRISP/client/package.json
+++ b/examples/CRISP/client/package.json
@@ -18,7 +18,7 @@
     "deploy": "gh-pages -d dist"
   },
   "dependencies": {
-    "@crisp-e3/sdk": "0.5.4",
+    "@crisp-e3/sdk": "0.5.6",
     "@emotion/babel-plugin": "^11.11.0",
     "@emotion/react": "^11.11.4",
     "@phosphor-icons/react": "^2.1.4",
diff --git a/examples/CRISP/packages/crisp-contracts/package.json b/examples/CRISP/packages/crisp-contracts/package.json
index e880974454..49af32d353 100644
--- a/examples/CRISP/packages/crisp-contracts/package.json
+++ b/examples/CRISP/packages/crisp-contracts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@crisp-e3/contracts",
-  "version": "0.5.4",
+  "version": "0.5.6",
   "type": "module",
   "files": [
     "contracts",
diff --git a/examples/CRISP/packages/crisp-sdk/package.json b/examples/CRISP/packages/crisp-sdk/package.json
index 2a2dc0d678..6f0b44bbeb 100644
--- a/examples/CRISP/packages/crisp-sdk/package.json
+++ b/examples/CRISP/packages/crisp-sdk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@crisp-e3/sdk",
-  "version": "0.5.4",
+  "version": "0.5.6",
   "type": "module",
   "author": {
     "name": "gnosisguild",
diff --git a/examples/CRISP/packages/crisp-sdk/src/utils.ts b/examples/CRISP/packages/crisp-sdk/src/utils.ts
index c49980f724..7317a128b9 100644
--- a/examples/CRISP/packages/crisp-sdk/src/utils.ts
+++ b/examples/CRISP/packages/crisp-sdk/src/utils.ts
@@ -124,27 +124,30 @@ export const getAddressFromSignature = async (signature: `0x${string}`, messageH
 }
 
 /**
- * Get optimal number of threads for proof generation
- * Leaves at least 1 core free for other operations
- * Works in both Node.js and browser environments
+ * Get optimal number of threads for proof generation.
+ * Leaves at least 1 core free for other operations.
+ * Works in both Node.js and browser environments.
  */
 export async function getOptimalThreadCount(): Promise<number> {
+  // Browser environment - check first to avoid Node.js imports in browser builds
+  if (typeof navigator !== 'undefined' && navigator.hardwareConcurrency) {
+    return Math.max(1, navigator.hardwareConcurrency - 1)
+  }
+
   // Node.js environment - use os module if available
-  if (typeof process !== 'undefined' && process.versions?.node) {
+  // Check for Node.js without directly accessing process to avoid polyfill detection
+  if (typeof window === 'undefined' && typeof globalThis !== 'undefined' && typeof globalThis.process !== 'undefined') {
     try {
       const os = await import('os')
+
       const cpuCount = typeof os.availableParallelism === 'function' ? os.availableParallelism() : os.cpus().length
+
       return Math.max(1, cpuCount - 1)
     } catch {
-      // Fall through to browser check or fallback
+      // Fall through to fallback
     }
   }
 
-  // Browser environment
-  if (typeof navigator !== 'undefined' && navigator.hardwareConcurrency) {
-    return Math.max(1, navigator.hardwareConcurrency - 1)
-  }
-
   // Fallback
   return 5
 }
diff --git a/examples/CRISP/packages/crisp-zk-inputs/package.json b/examples/CRISP/packages/crisp-zk-inputs/package.json
index c9120422e6..70d4b078c1 100644
--- a/examples/CRISP/packages/crisp-zk-inputs/package.json
+++ b/examples/CRISP/packages/crisp-zk-inputs/package.json
@@ -2,7 +2,7 @@
   "name": "@crisp-e3/zk-inputs",
   "type": "module",
   "description": "Core logic to pre-compute CRISP ZK inputs (WASM/JavaScript bindings).",
-  "version": "0.5.4",
+  "version": "0.5.6",
   "license": "LGPL-3.0-only",
   "repository": {
     "type": "git",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 39779de543..c117a0cb98 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -143,7 +143,7 @@ importers:
   examples/CRISP/client:
     dependencies:
       '@crisp-e3/sdk':
-        specifier: 0.5.4
+        specifier: 0.5.6
         version: link:../packages/crisp-sdk
       '@emotion/babel-plugin':
         specifier: ^11.11.0