diff --git a/CRISPResso2/CRISPRessoShared.py b/CRISPResso2/CRISPRessoShared.py
index 31998823..11b5f32e 100644
--- a/CRISPResso2/CRISPRessoShared.py
+++ b/CRISPResso2/CRISPRessoShared.py
@@ -272,7 +272,7 @@ def overwrite_crispresso_options(cmd, option_names_to_overwrite, option_values,
         if option:
             if option in option_values:
                 if paramInd is None:
-                    if type(option_values) == dict:
+                    if type(option_values) is dict:
                         val = option_values[option]
                     else:
                         val = getattr(option_values, option)
@@ -305,10 +305,10 @@ def overwrite_crispresso_options(cmd, option_names_to_overwrite, option_values,
             if action.nargs == 0:
                 if val:  # if value is true
                     new_cmd += ' --%s' % action.dest
-            elif action.type == bool:  # but just in case...
+            elif action.type is bool:  # but just in case...
                 if val:
                     new_cmd += ' --%s' % action.dest
-            elif action.type == str:
+            elif action.type is str:
                 if val != "":
                     if re.fullmatch(r"[a-zA-Z0-9\._]*", val):  # if the value is alphanumeric, don't have to quote it
                         new_cmd += ' --%s %s' % (action.dest, val)
@@ -316,7 +316,7 @@ def overwrite_crispresso_options(cmd, option_names_to_overwrite, option_values,
                         new_cmd += ' --%s %s' % (action.dest, val)
                     else:
                         new_cmd += ' --%s "%s"' % (action.dest, val)
-            elif action.type == int:
+            elif action.type is int:
                 new_cmd += ' --%s %s' % (action.dest, val)
 
     return new_cmd
@@ -350,7 +350,7 @@ def propagate_crispresso_options(cmd, options, params, paramInd=None):
         if option:
             if option in params:
                 if paramInd is None:
-                    if type(params) == dict:
+                    if type(params) is dict:
                         val = params[option]
                     else:
                         val = getattr(params, option)