diff --git a/cime_config/buildlib b/cime_config/buildlib
index 3bea6a47..292984e6 100755
--- a/cime_config/buildlib
+++ b/cime_config/buildlib
@@ -3,7 +3,7 @@
 """
 build blom library
 """
-import os, shutil, sys, glob, imp
+import os, sys
 
 _CIMEROOT = os.environ.get("CIMEROOT")
 if _CIMEROOT is None:
diff --git a/cime_config/buildlib_2.1 b/cime_config/buildlib_2.1
index b36dc37d..cff7f585 100755
--- a/cime_config/buildlib_2.1
+++ b/cime_config/buildlib_2.1
@@ -3,7 +3,8 @@
 """
 build blom library
 """
-import os, shutil, sys, glob, imp
+import os, shutil, sys, glob
+from importlib.machinery import SourceFileLoader
 
 _CIMEROOT = os.environ.get("CIMEROOT")
 if _CIMEROOT is None:
@@ -32,7 +33,7 @@ def _main_func():
         cmd = os.path.join(os.path.join(comp_root_dir_ocn, "cime_config", "buildcpp"))
         logger.info("     ...calling blom buildcpp to set build time options")
         try:
-            mod = imp.load_source("buildcpp", cmd)
+            mod = SourceFileLoader("buildcpp", cmd).load_module()
             blom_cppdefs = mod.buildcpp(case)
         except:
             raise
diff --git a/cime_config/buildlib_2.2 b/cime_config/buildlib_2.2
index ec30963c..a7daa07f 100755
--- a/cime_config/buildlib_2.2
+++ b/cime_config/buildlib_2.2
@@ -3,7 +3,8 @@
 """
 build blom library
 """
-import os, shutil, sys, glob, imp
+import os, shutil, sys, glob
+from importlib.machinery import SourceFileLoader
 
 _CIMEROOT = os.environ.get("CIMEROOT")
 if _CIMEROOT is None:
@@ -33,7 +34,7 @@ def _main_func():
         cmd = os.path.join(os.path.join(comp_root_dir_ocn, "cime_config", "buildcpp"))
         logger.info("     ...calling blom buildcpp to set build time options")
         try:
-            mod = imp.load_source("buildcpp", cmd)
+            mod = SourceFileLoader("buildcpp", cmd).load_module()
             blom_cppdefs = mod.buildcpp(case)
         except:
             raise