diff --git a/src/lib/file.hpp b/src/lib/file.hpp
index c794d04..f739e57 100644
--- a/src/lib/file.hpp
+++ b/src/lib/file.hpp
@@ -16,6 +16,8 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#pragma once
+
 #include <cstdint>
 #include <string>
 #include <fstream>
diff --git a/src/lib/javacompat.hpp b/src/lib/javacompat.hpp
index a8c054b..4121a76 100644
--- a/src/lib/javacompat.hpp
+++ b/src/lib/javacompat.hpp
@@ -13,6 +13,8 @@
 //version 3 along with this program.
 //If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#pragma once
+
 #include <tinyutf8/tinyutf8.h>
 #include <string>
 #include "error.hpp"
diff --git a/src/lib/net/conversion/position.hpp b/src/lib/net/conversion/position.hpp
index b5954bf..5540bde 100644
--- a/src/lib/net/conversion/position.hpp
+++ b/src/lib/net/conversion/position.hpp
@@ -16,6 +16,8 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#pragma once
+
 #include <cstdint>
 #include <vector>
 
diff --git a/src/lib/net/conversion/varint.hpp b/src/lib/net/conversion/varint.hpp
index 17dcf44..16bfd4a 100644
--- a/src/lib/net/conversion/varint.hpp
+++ b/src/lib/net/conversion/varint.hpp
@@ -16,6 +16,8 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#pragma once
+
 #include <cstdint>
 #include <vector>
 
diff --git a/src/lib/net/packet.hpp b/src/lib/net/packet.hpp
index 9e270e6..b600486 100644
--- a/src/lib/net/packet.hpp
+++ b/src/lib/net/packet.hpp
@@ -16,6 +16,8 @@
 // version 3 along with this program.
 // If not, see https://www.gnu.org/licenses/agpl-3.0.en.html
 
+#pragma once
+
 #include <vector>
 #include <cstdint>