diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e9fa3a..452bb79 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 * Beta support for custom secret providers added to Manager.
 
+## v1.5.1 - 2024-03-08 - env/* type conversion fix
+
+* Improved env variable to parameter type conversion logic, avoid converting
+  all numbers to float which caused some formatting issues in things that
+  weren't being careful enough.
+
 ## v1.5.0 - 2024-02-26 - Checksums, nested expansion, & flexable values
 
 * Beta support for Manager.enable_checksum and octodns-sync --checksum Allows a
diff --git a/octodns/__init__.py b/octodns/__init__.py
index 12c987c..ebfb66e 100644
--- a/octodns/__init__.py
+++ b/octodns/__init__.py
@@ -1,4 +1,4 @@
 'OctoDNS: DNS as code - Tools for managing DNS across multiple providers'
 
 # TODO: remove __VERSION__ w/2.x
-__version__ = __VERSION__ = '1.5.0'
+__version__ = __VERSION__ = '1.5.1'
diff --git a/octodns/manager.py b/octodns/manager.py
index 7c84deb..524b397 100644
--- a/octodns/manager.py
+++ b/octodns/manager.py
@@ -434,6 +434,18 @@ class Manager(object):
                     else:
                         v = handler.fetch(name, source)
 
+                    if isinstance(v, str):
+                        try:
+                            if '.' in v:
+                                # has a dot, try converting it to a float
+                                v = float(v)
+                            else:
+                                # no dot, try converting it to an int
+                                v = int(v)
+                        except ValueError:
+                            # just leave it as a string
+                            pass
+
             kwargs[k] = v
 
         return kwargs
diff --git a/tests/test_octodns_manager.py b/tests/test_octodns_manager.py
index 04eb68c..53b0ec7 100644
--- a/tests/test_octodns_manager.py
+++ b/tests/test_octodns_manager.py
@@ -1137,6 +1137,7 @@ class TestManager(TestCase):
 
         environ['OCTODNS_TEST_1'] = '42'
         environ['OCTODNS_TEST_2'] = 'string'
+        environ['OCTODNS_TEST_3'] = '43.44'
 
         # empty
         self.assertEqual({}, manager._build_kwargs({}))
@@ -1206,6 +1207,18 @@ class TestManager(TestCase):
             ),
         )
 
+        # types/conversion
+        self.assertEqual(
+            {'int': 42, 'string': 'string', 'float': 43.44},
+            manager._build_kwargs(
+                {
+                    'int': 'env/OCTODNS_TEST_1',
+                    'string': 'env/OCTODNS_TEST_2',
+                    'float': 'env/OCTODNS_TEST_3',
+                }
+            ),
+        )
+
     def test_config_secret_handlers(self):
         # config doesn't matter here
         manager = Manager(get_config_filename('simple.yaml'))