diff --git a/include/json b/include/json
index 350ff4f..1cd5ab3 160000
--- a/include/json
+++ b/include/json
@@ -1 +1 @@
-Subproject commit 350ff4f7ced7c4117eae2fb93df02823c8021fcb
+Subproject commit 1cd5ab34efd15bf46e5a8b618c0b3572aa192b7f
diff --git a/world.cpp b/world.cpp
index 300841a..83ca461 100644
--- a/world.cpp
+++ b/world.cpp
@@ -348,6 +348,7 @@ void thuai::World::addEgg(int index) {
   bodyDef.type = b2_dynamicBody;
   bodyDef.position.Set(static_cast<float>(eggs[index]->position().x),
                        static_cast<float>(eggs[index]->position().y));
+  bodyDef.linearDamping = 0.25f;
   b2eggs[index] = b2world->CreateBody(&bodyDef);
   b2eggs[index]->SetUserData(new b2bodydata(eggs[index], b2eggs[index]));
   b2CircleShape dynamicBox;