diff --git a/pysipp/launch.py b/pysipp/launch.py
index a032011..d6098cd 100644
--- a/pysipp/launch.py
+++ b/pysipp/launch.py
@@ -142,7 +142,7 @@ def _signalall(self, signum):
         signalled = OrderedDict()
         for cmd, proc in self.iterprocs():
             proc.send_signal(signum)
-            log.warn(
+            log.warning(
                 "sent signal '{}' to cmd '{}' with pid '{}'".format(
                     signum, cmd, proc.pid
                 )
diff --git a/pysipp/report.py b/pysipp/report.py
index ba34f11..ef76c22 100644
--- a/pysipp/report.py
+++ b/pysipp/report.py
@@ -44,7 +44,7 @@ def err_summary(agents2procs):
         return msg
 
 
-def emit_logfiles(agents2procs, level="warn", max_lines=100):
+def emit_logfiles(agents2procs, level="warning", max_lines=100):
     """Log all available SIPp log-file contents"""
     emit = getattr(log, level)
     for ua, proc in agents2procs:
diff --git a/pysipp/utils.py b/pysipp/utils.py
index 2c1ec09..0fa2f28 100644
--- a/pysipp/utils.py
+++ b/pysipp/utils.py
@@ -1,8 +1,9 @@
-import imp  # XXX py2.7
+import importlib
 import inspect
 import logging
 import os
 import tempfile
+import types
 
 LOG_FORMAT = (
     "%(asctime)s %(threadName)s [%(levelname)s] %(name)s "
@@ -12,6 +13,19 @@
 DATE_FORMAT = "%b %d %H:%M:%S"
 
 
+def load_source(name: str, path: str) -> types.ModuleType:
+    """
+    Replacement for deprecated imp.load_source()
+    Thanks to:
+    https://github.com/epfl-scitas/spack for pointing out the
+    important missing "spec.loader.exec_module(module)" line.
+    """
+    spec = importlib.util.spec_from_file_location(name, path)
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
 def get_logger():
     """Get the project logger instance"""
     return logging.getLogger("pysipp")
@@ -32,7 +46,7 @@ def load_mod(path, name=None):
     """Load a source file as a module"""
     name = name or os.path.splitext(os.path.basename(path))[0]
     # load module sources
-    return imp.load_source(name, path)
+    return load_source(name, path)
 
 
 def iter_data_descrs(cls):
diff --git a/tests/test_utils.py b/tests/test_utils.py
new file mode 100644
index 0000000..7bee332
--- /dev/null
+++ b/tests/test_utils.py
@@ -0,0 +1,15 @@
+import os.path
+
+import pytest
+
+from pysipp import utils
+
+
+def test_load_mod(scendir):
+    confpy = os.path.join(scendir, "default_with_confpy", "pysipp_conf.py")
+    assert utils.load_mod(confpy)
+
+
+def test_load_mod_ko():
+    with pytest.raises(FileNotFoundError):
+        utils.load_mod("not_here.py")