diff --git a/scripts/install_solc.sh b/scripts/install_solc.sh
old mode 100755
new mode 100644
index c84162518..467aed4aa
--- a/scripts/install_solc.sh
+++ b/scripts/install_solc.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 
-sudo add-apt-repository ppa:ethereum/ethereum
-sudo apt-get update
+sudo add-apt-repository -y ppa:ethereum/ethereum
+sudo apt-get -y update
 sudo apt-get -y install solc