diff --git a/include/beman/monadics/detail/and_then.hpp b/include/beman/monadics/detail/and_then.hpp
index 4fc6460..95fe76b 100644
--- a/include/beman/monadics/detail/and_then.hpp
+++ b/include/beman/monadics/detail/and_then.hpp
@@ -3,11 +3,11 @@
 #ifndef BEMAN_MONADICS_DETAIL_AND_THEN_HPP
 #define BEMAN_MONADICS_DETAIL_AND_THEN_HPP
 
-#include "beman/monadics/detail/get_box_traits.hpp"
-#include "beman/monadics/detail/invoke_with_value.hpp"
-#include "beman/monadics/detail/pipe_adaptor.hpp"
-#include "beman/monadics/detail/rebox_error.hpp"
-#include "beman/monadics/detail/same_box.hpp"
+#include <beman/monadics/detail/get_box_traits.hpp>
+#include <beman/monadics/detail/invoke_with_value.hpp>
+#include <beman/monadics/detail/pipe_adaptor.hpp>
+#include <beman/monadics/detail/rebox_error.hpp>
+#include <beman/monadics/detail/same_box.hpp>
 
 #include <utility>
 
diff --git a/include/beman/monadics/detail/invoke_with_error.hpp b/include/beman/monadics/detail/invoke_with_error.hpp
index d2b78eb..1e5a08e 100644
--- a/include/beman/monadics/detail/invoke_with_error.hpp
+++ b/include/beman/monadics/detail/invoke_with_error.hpp
@@ -3,7 +3,7 @@
 #ifndef BEMAN_MONADICS_DETAIL_INVOKE_WITH_ERROR_HPP
 #define BEMAN_MONADICS_DETAIL_INVOKE_WITH_ERROR_HPP
 
-#include "beman/monadics/detail/get_box_traits.hpp"
+#include <beman/monadics/detail/get_box_traits.hpp>
 
 #include <concepts>
 #include <utility>
diff --git a/include/beman/monadics/detail/invoke_with_value.hpp b/include/beman/monadics/detail/invoke_with_value.hpp
index 030a415..a773242 100644
--- a/include/beman/monadics/detail/invoke_with_value.hpp
+++ b/include/beman/monadics/detail/invoke_with_value.hpp
@@ -3,7 +3,7 @@
 #ifndef BEMAN_MONADICS_DETAIL_INVOKE_WITH_VALUE_HPP
 #define BEMAN_MONADICS_DETAIL_INVOKE_WITH_VALUE_HPP
 
-#include "beman/monadics/detail/get_box_traits.hpp"
+#include <beman/monadics/detail/get_box_traits.hpp>
 
 #include <concepts>
 #include <utility>
diff --git a/include/beman/monadics/detail/pipe_adaptor.hpp b/include/beman/monadics/detail/pipe_adaptor.hpp
index 5012468..0703945 100644
--- a/include/beman/monadics/detail/pipe_adaptor.hpp
+++ b/include/beman/monadics/detail/pipe_adaptor.hpp
@@ -3,7 +3,7 @@
 #ifndef BEMAN_MONADICS_DETAIL_PIPE_ADAPTOR_HPP
 #define BEMAN_MONADICS_DETAIL_PIPE_ADAPTOR_HPP
 
-#include "beman/monadics/detail/access_key.hpp"
+#include <beman/monadics/detail/access_key.hpp>
 
 #include <type_traits>
 #include <utility>
diff --git a/include/beman/monadics/monadics.hpp b/include/beman/monadics/monadics.hpp
index ffd899e..1d8c2b7 100644
--- a/include/beman/monadics/monadics.hpp
+++ b/include/beman/monadics/monadics.hpp
@@ -3,11 +3,11 @@
 #ifndef BEMAN_MONADICS_MONADICS_HPP
 #define BEMAN_MONADICS_MONADICS_HPP
 
-#include "beman/monadics/detail/access_key.hpp"
-#include "beman/monadics/detail/pipe_adaptor.hpp"
+#include <beman/monadics/detail/access_key.hpp>
 #include <beman/monadics/detail/and_then.hpp>
 #include <beman/monadics/detail/get_box_traits.hpp>
 #include <beman/monadics/detail/or_else.hpp>
+#include <beman/monadics/detail/pipe_adaptor.hpp>
 #include <beman/monadics/detail/transform.hpp>
 #include <beman/monadics/detail/transform_error.hpp>
 
diff --git a/tests/beman/monadics/enum/and_then.test.cpp b/tests/beman/monadics/enum/and_then.test.cpp
index ae7b689..aed74c3 100644
--- a/tests/beman/monadics/enum/and_then.test.cpp
+++ b/tests/beman/monadics/enum/and_then.test.cpp
@@ -2,7 +2,7 @@
 
 #include "trait.hpp"
 
-#include "beman/monadics/detail/and_then.hpp"
+#include <beman/monadics/detail/and_then.hpp>
 
 #include <catch2/catch_test_macros.hpp>
 
diff --git a/tests/beman/monadics/enum/compose.test.cpp b/tests/beman/monadics/enum/compose.test.cpp
index ae1edd0..257eee3 100644
--- a/tests/beman/monadics/enum/compose.test.cpp
+++ b/tests/beman/monadics/enum/compose.test.cpp
@@ -2,7 +2,7 @@
 
 #include "trait.hpp"
 
-#include "beman/monadics/monadics.hpp"
+#include <beman/monadics/monadics.hpp>
 
 #include <catch2/catch_test_macros.hpp>
 
diff --git a/tests/beman/monadics/enum/or_else.test.cpp b/tests/beman/monadics/enum/or_else.test.cpp
index 5698028..76b5d5b 100644
--- a/tests/beman/monadics/enum/or_else.test.cpp
+++ b/tests/beman/monadics/enum/or_else.test.cpp
@@ -2,7 +2,7 @@
 
 #include "trait.hpp"
 
-#include "beman/monadics/detail/or_else.hpp"
+#include <beman/monadics/detail/or_else.hpp>
 
 #include <catch2/catch_template_test_macros.hpp>
 
diff --git a/tests/beman/monadics/enum/transform.test.cpp b/tests/beman/monadics/enum/transform.test.cpp
index 5d1a9cf..0676ee3 100644
--- a/tests/beman/monadics/enum/transform.test.cpp
+++ b/tests/beman/monadics/enum/transform.test.cpp
@@ -2,7 +2,7 @@
 
 #include "trait.hpp"
 
-#include "beman/monadics/detail/transform.hpp"
+#include <beman/monadics/detail/transform.hpp>
 
 #include <catch2/catch_test_macros.hpp>