diff --git a/db_revisions/env.py b/db_revisions/env.py
index 984b617..5547e1f 100644
--- a/db_revisions/env.py
+++ b/db_revisions/env.py
@@ -30,7 +30,7 @@
 INST_DB_HOST = os.environ.get("INST_DB_HOST")
 INST_DB_NAME = os.environ.get("INST_DB_NAME")
 INST_DB_SCHEMA = os.environ.get("INST_DB_SCHEMA")
-INST_CONN = f"postgresql://{INST_DB_USER}:{parse.quote(INST_DB_PWD, safe='')}@{INST_DB_HOST}/{INST_DB_NAME}"
+INST_CONN = f"postgresql://{INST_DB_USER}:{(parse.quote(INST_DB_PWD, safe='')).replace('%', '%%')}@{INST_DB_HOST}/{INST_DB_NAME}"
 config.set_main_option("sqlalchemy.url", INST_CONN)
 
 # end specific SBL configuration