diff --git a/js/web/lib/wasm/jsep/init.ts b/js/web/lib/wasm/jsep/init.ts
index cad1e87b24a51..3c6edf3ebb35d 100644
--- a/js/web/lib/wasm/jsep/init.ts
+++ b/js/web/lib/wasm/jsep/init.ts
@@ -69,7 +69,7 @@ class ComputeContextImpl implements ComputeContext {
     const heapU32 = module.HEAPU32;
 
     // extract context data
-    let dataIndex = (contextDataOffset >> 2);
+    let dataIndex = (contextDataOffset >>> 2);
     this.opKernelContext = heapU32[dataIndex++];
     const inputCount = heapU32[dataIndex++];
     this.outputCount = heapU32[dataIndex++];
diff --git a/onnxruntime/core/providers/js/js_kernel.h b/onnxruntime/core/providers/js/js_kernel.h
index fdd5c7dee5bfc..5c2d1f0b881ba 100644
--- a/onnxruntime/core/providers/js/js_kernel.h
+++ b/onnxruntime/core/providers/js/js_kernel.h
@@ -197,7 +197,7 @@ class JsKernel : public OpKernel {
 
     int status_code = EM_ASM_INT(
         { return Module.jsepRunKernel($0, $1, Module.jsepSessionState.sessionHandle, Module.jsepSessionState.errors); },
-        this, reinterpret_cast<int32_t>(p_serialized_kernel_context));
+        this, reinterpret_cast<uint32_t>(p_serialized_kernel_context));
 
     LOGS_DEFAULT(VERBOSE) << "outputs = " << context->OutputCount() << ". Y.data="
                           << (size_t)(context->Output<Tensor>(0)->DataRaw()) << ".";