diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca2377d..b9ff019 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,7 @@ set_directory_properties( PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/third_party )
 ExternalProject_Add(
     gsl-extern
     GIT_REPOSITORY ${GSL_LITE_URL}
-    GIT_TAG v0.37.0
+    GIT_TAG v1.1.0
     TIMEOUT 10
     UPDATE_COMMAND ""
     CONFIGURE_COMMAND ""
diff --git a/include/sframe/sframe.h b/include/sframe/sframe.h
index 1555213..80264b8 100644
--- a/include/sframe/sframe.h
+++ b/include/sframe/sframe.h
@@ -5,11 +5,13 @@
 #include <memory>
 #include <vector>
 
-#include <gsl/gsl-lite.hpp>
+#include <gsl-lite/gsl-lite.hpp>
 #include <namespace.h>
 
 namespace SFRAME_NAMESPACE {
 
+namespace gsl = ::gsl_lite;
+
 struct openssl_error : std::runtime_error
 {
   openssl_error();