diff --git a/extensions/notebook/src/dialog/managePackages/managePackagesDialog.ts b/extensions/notebook/src/dialog/managePackages/managePackagesDialog.ts
index e7dfb9d958..6560094753 100644
--- a/extensions/notebook/src/dialog/managePackages/managePackagesDialog.ts
+++ b/extensions/notebook/src/dialog/managePackages/managePackagesDialog.ts
@@ -38,6 +38,10 @@ export class ManagePackagesDialog {
 
 		this.dialog.content = [this.installedPkgTab.tab, this.addNewPkgTab.tab];
 
+		this.dialog.registerCloseValidator(() => {
+			return false; // Blocks Enter key from closing dialog.
+		});
+
 		azdata.window.openDialog(this.dialog);
 	}
 
@@ -64,4 +68,4 @@ export class ManagePackagesDialog {
 			level: azdata.window.MessageLevel.Error
 		};
 	}
-}
\ No newline at end of file
+}