diff --git a/Dockerfile b/Dockerfile
index 7d59060..0d46a81 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,8 +17,11 @@ COPY . .
 # Importante: a compilação do WASM exige GOOS=js/GOARCH=wasm.
 RUN GOOS=js GOARCH=wasm go build -trimpath -ldflags="-s -w" -o web/static/e-li.nps.wasm ./cmd/widgetwasm
 
-# Copia o runtime JS do Go para WASM (Go class, polyfills)
-RUN cp "$(go env GOROOT)/lib/wasm/wasm_exec.js" web/static/wasm_exec.js
+# Copia o runtime JS do Go para WASM (Go class, polyfills).
+# Observação: o caminho do wasm_exec.js pode variar por distribuição do Go.
+RUN GOROOT="$(go env GOROOT)" \
+  && (cp "$GOROOT/misc/wasm/wasm_exec.js" web/static/wasm_exec.js \
+      || cp "$GOROOT/lib/wasm/wasm_exec.js" web/static/wasm_exec.js)
 
 # Build do binário
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \