diff --git a/Dockerfile b/Dockerfile
index d00f857..ea7987a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,11 +6,11 @@ WORKDIR /app
 # Install build dependencies
 RUN apk add --no-cache git ca-certificates
 
-# Copy all files first so Go has full package context
+# Copy all source files
 COPY . .
 
-# Tidy and download dependencies with full visibility to resolve any checksum discrepancies
-RUN go mod tidy && go mod download
+# Remove any outdated/corrupted go.sum and let Go regenerate a pristine, valid one
+RUN rm -f go.sum && go mod tidy && go mod download
 
 # Build the application
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o blogging-cms .