diff --git a/src/common.h b/src/common.h
index e81b417..6be9148 100644
--- a/src/common.h
+++ b/src/common.h
@@ -13,6 +13,7 @@
 #include <tuple>
 
 namespace py = pybind11;
+using namespace pybind11::literals;
 
 #if PY_MAJOR_VERSION >= 3
 #define PY_DIV "__truediv__"
diff --git a/src/utility/shortestPaths.cpp b/src/utility/shortestPaths.cpp
index 13b8c34..89caa27 100644
--- a/src/utility/shortestPaths.cpp
+++ b/src/utility/shortestPaths.cpp
@@ -3,7 +3,6 @@
 
 #include <string>
 
-using namespace pybind11::literals;
 
 void define_ksp(py::module& m) {