diff --git a/Dockerfile b/Dockerfile
index 6948512..d967d0d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,9 +7,9 @@ WORKDIR /godoor
 COPY go.mod go.sum ./
 RUN go mod download && go mod verify
 
-
 COPY . .
 
+# fully static build (takes ~300s to build):
 ENV GOBUILDLDFLAGS="-linkmode 'external' -extldflags '-static'"
 RUN go build -tags netgo .
 
diff --git a/godoor.go b/godoor.go
index 888c358..5eb59e2 100644
--- a/godoor.go
+++ b/godoor.go
@@ -235,7 +235,7 @@ func setup(ctx context.Context) {
 }
 
 func listenSig1(ctx context.Context, wiegand Wiegand) {
-	usrSig := make(chan os.Signal)
+	usrSig := make(chan os.Signal, 1)
 	signal.Notify(usrSig, syscall.SIGUSR1)
 
 	for {