diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e6f315d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "libraries/parallel-hashmap"]
+	path = libraries/parallel-hashmap
+	url = https://github.com/greg7mdp/parallel-hashmap.git
diff --git a/include/blt/profiling/profiler.h b/include/blt/profiling/profiler.h
index 6952aa2..6b32f62 100644
--- a/include/blt/profiling/profiler.h
+++ b/include/blt/profiling/profiler.h
@@ -9,7 +9,8 @@
 
 #include <string>
 #include <string_view>
-#include <map>
+#include <unordered_map>
+
 
 namespace BLT {
     struct CapturePoint {
diff --git a/libraries/parallel-hashmap b/libraries/parallel-hashmap
new file mode 160000
index 0000000..c36739b
--- /dev/null
+++ b/libraries/parallel-hashmap
@@ -0,0 +1 @@
+Subproject commit c36739b79ff1dd506708de251c43e8c778da2c00