diff --git a/pum/cli.py b/pum/cli.py
index 178ac2df..b65df82f 100755
--- a/pum/cli.py
+++ b/pum/cli.py
@@ -9,12 +9,12 @@
 
 import psycopg
 
-from pum.checker import Checker
-from pum.config import PumConfig
+from .checker import Checker
+from .config import PumConfig
 
-# from pum.dumper import Dumper
-from pum.info import run_info
-from pum.upgrader import Upgrader
+# from .dumper import Dumper
+from .info import run_info
+from .upgrader import Upgrader
 
 
 def setup_logging(verbosity: int = 0):
diff --git a/pum/dumper.py b/pum/dumper.py
index f3e2b6bf..d1fbb1bb 100755
--- a/pum/dumper.py
+++ b/pum/dumper.py
@@ -2,7 +2,7 @@
 import sys
 from distutils.version import LooseVersion
 
-from pum.core.exceptions import (
+from .core.exceptions import (
     PgDumpCommandError,
     PgDumpFailed,
     PgRestoreCommandError,
diff --git a/pum/info.py b/pum/info.py
index 9882fbc8..43d674e8 100644
--- a/pum/info.py
+++ b/pum/info.py
@@ -1,8 +1,8 @@
 import logging
 import sys
 
-from pum.config import PumConfig
-from pum.schema_migrations import SchemaMigrations
+from .config import PumConfig
+from .schema_migrations import SchemaMigrations
 
 logger = logging.getLogger(__name__)
 
diff --git a/pum/schema_migrations.py b/pum/schema_migrations.py
index 1cae9119..34854e29 100644
--- a/pum/schema_migrations.py
+++ b/pum/schema_migrations.py
@@ -14,8 +14,8 @@
 from packaging.version import Version
 from psycopg import Connection, sql
 
-from pum.config import PumConfig
-from pum.utils.execute_sql import execute_sql
+from .config import PumConfig
+from .utils.execute_sql import execute_sql
 
 logger = logging.getLogger(__name__)
 
diff --git a/pum/upgrader.py b/pum/upgrader.py
index 90530223..cfaddabd 100755
--- a/pum/upgrader.py
+++ b/pum/upgrader.py
@@ -11,10 +11,10 @@
 from packaging.version import parse as parse_version
 from psycopg import Connection
 
-from pum.config import PumConfig
-from pum.exceptions import PumException
-from pum.schema_migrations import SchemaMigrations
-from pum.utils.execute_sql import execute_sql
+from .config import PumConfig
+from .exceptions import PumException
+from .schema_migrations import SchemaMigrations
+from .utils.execute_sql import execute_sql
 
 logger = logging.getLogger(__name__)
 
diff --git a/pum/utils/execute_sql.py b/pum/utils/execute_sql.py
index 6de0ff57..e1db284b 100644
--- a/pum/utils/execute_sql.py
+++ b/pum/utils/execute_sql.py
@@ -4,7 +4,7 @@
 from psycopg import Connection, Cursor
 from psycopg.errors import SyntaxError
 
-from pum.exceptions import PumSqlException
+from .exceptions import PumSqlException
 import re
 
 logger = logging.getLogger(__name__)