diff --git a/README.md b/README.md
index cc52a4e..f3acc39 100644
--- a/README.md
+++ b/README.md
@@ -185,14 +185,14 @@ $ cmake --build "DESTINATION_SHARED_DIR" --config Release --target install
 ### Demo2d
 
 <div align="center">
-  <div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; max-width: 800px; margin: auto;">
-    <img src="./demo/img/demo2d_1.gif" style="width: 100%; height: auto; max-width: 200px;" />
-    <img src="./demo/img/demo2d_2.gif" style="width: 100%; height: auto; max-width: 200px;" />
-    <img src="./demo/img/demo2d_3.gif" style="width: 100%; height: auto; max-width: 200px;" />
-    <img src="./demo/img/demo2d_4.gif" style="width: 100%; height: auto; max-width: 200px;" />
-    <img src="./demo/img/demo2d_5.gif" style="width: 100%; height: auto; max-width: 200px;" />
-    <img src="./demo/img/demo2d_6.gif" style="width: 100%; height: auto; max-width: 200px;" />
-    <img src="./demo/img/demo2d_7.gif" style="width: 100%; height: auto; max-width: 200px;" />
+  <div style="display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; max-width: 800px; margin: auto;">
+    <img src="./demo/img/demo2d_1.gif" style="width: 100%; height: auto;" />
+    <img src="./demo/img/demo2d_2.gif" style="width: 100%; height: auto;" />
+    <img src="./demo/img/demo2d_3.gif" style="width: 100%; height: auto;" />
+    <img src="./demo/img/demo2d_4.gif" style="width: 100%; height: auto;" />
+    <img src="./demo/img/demo2d_5.gif" style="width: 100%; height: auto;" />
+    <img src="./demo/img/demo2d_6.gif" style="width: 100%; height: auto;" />
+    <img src="./demo/img/demo2d_7.gif" style="width: 100%; height: auto;" />
   </div>
 </div>
 
@@ -201,8 +201,8 @@ $ cmake --build "DESTINATION_SHARED_DIR" --config Release --target install
 CUDA can be used to accelerate the simulation of mass spring system. 
 
 <div align="center">
-  <div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; max-width: 800px; margin: auto;">
-    <img src="./demo/img/MassSpring3D_1.gif" style="width: 100%; height: auto; max-width: 200px;" />
+  <div style="display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; max-width: 800px; margin: auto;">
+    <img src="./demo/img/MassSpring3D_1.gif" style="width: 100%; height: auto;" />
   </div>
 </div>