diff --git a/encryption_package/ddl/install.sql b/encryption_package/ddl/install.sql
index 214a8d6..9800d06 100644
--- a/encryption_package/ddl/install.sql
+++ b/encryption_package/ddl/install.sql
@@ -2,8 +2,8 @@ select version();
 
 \set libfile '\''`pwd`'/lib/Encryption.so\'';
 
-CREATE LIBRARY Encryption as :libfile;
-CREATE FUNCTION AESEncrypt as language 'C++' name 'AESEncryptFactory' library Encryption;
-CREATE FUNCTION AESDecrypt as language 'C++' name 'AESDecryptFactory' library Encryption;
+CREATE OR REPLACE LIBRARY Encryption as :libfile;
+CREATE OR REPLACE FUNCTION AESEncrypt as language 'C++' name 'AESEncryptFactory' library Encryption;
+CREATE OR REPLACE FUNCTION AESDecrypt as language 'C++' name 'AESDecryptFactory' library Encryption;