diff --git a/src/cli/replicate.ts b/src/cli/replicate.ts
index 0ef616a..6139665 100644
--- a/src/cli/replicate.ts
+++ b/src/cli/replicate.ts
@@ -50,7 +50,15 @@ export default class Replicate extends Command {
 
     const { source, dest } = {
       ...proj,
-      ...(args as {
+
+      // oclif does set undefined values for non-existant args
+      // so we have to filter out these values, or they will replace project config values
+      ...(Object.keys(args)
+        .filter((ak) => args[ak])
+        .reduce((acc, curk) => {
+          acc[curk] = args[curk];
+          return acc;
+        }, {} as { [k: string]: string }) as {
         source: string;
         dest?: string;
       }),