diff --git a/resources/config/lights_dorm.json b/resources/config/lights_dorm.json
index 83ab377..d459550 100644
--- a/resources/config/lights_dorm.json
+++ b/resources/config/lights_dorm.json
@@ -3,7 +3,7 @@
         {
             "id": "main_hall",
             "positionX": -3.1,
-            "positionY": 6.0,
+            "positionY": 4.8,
             "positionZ": 0.0,
             "directionX": 0.0,
             "directionY": -1.0,
@@ -20,7 +20,7 @@
             "limitX": 3.75,
             "limitY": 2.75,
             "positionX": 4.95,
-            "positionY": 3.0,
+            "positionY": 3.6,
             "positionZ": -14.25,
             "directionX": 0.0,
             "directionY": -1.0,
@@ -55,7 +55,7 @@
             "limitX": 3.75,
             "limitY": 2.75,
             "positionX": -4.95,
-            "positionY": 4.0,
+            "positionY": 4.2,
             "positionZ": -19.95,
             "directionX": 0.0,
             "directionY": -1.0,
diff --git a/resources/shaders/default_shadow_web.vertex b/resources/shaders/default_shadow_web.vertex
index 7f3b9c5..7a82206 100644
--- a/resources/shaders/default_shadow_web.vertex
+++ b/resources/shaders/default_shadow_web.vertex
@@ -1,3 +1,4 @@
+precision highp float;
 attribute vec3 vPosition;
 attribute vec2 vTexCoord;
 attribute vec3 vNormal;
diff --git a/resources/shaders/night_fog_shadow_web.fragment b/resources/shaders/night_fog_shadow_web.fragment
index 7e7a4b1..74a474d 100644
--- a/resources/shaders/night_fog_shadow_web.fragment
+++ b/resources/shaders/night_fog_shadow_web.fragment
@@ -1,4 +1,4 @@
-precision mediump float;
+precision highp float;
 
 uniform sampler2D Texture;
 uniform sampler2D uShadowMap;
diff --git a/resources/shaders/night_fog_shadow_web.vertex b/resources/shaders/night_fog_shadow_web.vertex
index 8452efa..4a4460d 100644
--- a/resources/shaders/night_fog_shadow_web.vertex
+++ b/resources/shaders/night_fog_shadow_web.vertex
@@ -1,3 +1,4 @@
+precision highp float;
 attribute vec3 vPosition;
 attribute vec2 vTexCoord;
 attribute vec3 vNormal;