diff --git a/forge-cascade-v2/pyproject.toml b/forge-cascade-v2/pyproject.toml
index 08370c12..4108c3b0 100644
--- a/forge-cascade-v2/pyproject.toml
+++ b/forge-cascade-v2/pyproject.toml
@@ -81,7 +81,7 @@ dev = [
     "types-PyYAML>=6.0.0,<7.0.0",
 ]
 wasm = [
-    "wasmtime>=15.0.0,<26.0.0",
+    "wasmtime>=15.0.0,<42.0.0",
 ]
 
 [project.scripts]
diff --git a/forge-cascade-v2/requirements-base.txt b/forge-cascade-v2/requirements-base.txt
index 084a37cc..34abcfcd 100644
--- a/forge-cascade-v2/requirements-base.txt
+++ b/forge-cascade-v2/requirements-base.txt
@@ -56,7 +56,7 @@ base58==2.1.1  # Pinned for reproducibility
 
 # WASM Runtime - Required for true sandboxed overlay execution
 # Provides memory isolation, fuel metering, and secure execution
-wasmtime==27.0.0  # Pinned for reproducibility
+wasmtime==41.0.0  # Pinned for reproducibility
 
 # Security overrides - explicit pins for CVE fixes
 starlette==0.49.1  # CVE-2025-62727 (FastAPI transitive dependency)