diff --git a/Easing.h b/Easing.h
index 6b4b329..93fa045 100644
--- a/Easing.h
+++ b/Easing.h
@@ -2,57 +2,57 @@
 namespace EasingFunc {
     typedef float(*eFunc)(float);
     
-    float easeLinear(float t) {
+    static float easeLinear(float t) {
         return t;
     }
 
-    float easeInSine(float t) {
+    static float easeInSine(float t) {
         return sin(1.5707963 * t);
     }
 
-    float easeOutSine(float t) {
+    static float easeOutSine(float t) {
         return 1 + sin(1.5707963 * (--t));
     }
 
-    float easeInOutSine(float t) {
+    static float easeInOutSine(float t) {
         return 0.5 * (1 + sin(3.1415926 * (t - 0.5)));
     }
 
-    float easeInQuad(float t) {
+    static float easeInQuad(float t) {
         return t * t;
     }
 
-    float easeOutQuad(float t) {
+    static float easeOutQuad(float t) {
         return t * (2 - t);
     }
 
-    float easeInOutQuad(float t) {
+    static float easeInOutQuad(float t) {
         return t < 0.5 ? 2 * t * t : t * (4 - 2 * t) - 1;
     }
 
-    float easeInCubic(float t) {
+    static float easeInCubic(float t) {
         return t * t * t;
     }
 
-    float easeOutCubic(float t) {
+    static float easeOutCubic(float t) {
         return 1 + (--t) * t * t;
     }
 
-    float easeInOutCubic(float t) {
+    static float easeInOutCubic(float t) {
         return t < 0.5 ? 4 * t * t * t : 1 + (--t) * (2 * (--t)) * (2 * t);
     }
 
-    float easeInQuart(float t) {
+    static float easeInQuart(float t) {
         t *= t;
         return t * t;
     }
 
-    float easeOutQuart(float t) {
+    static float easeOutQuart(float t) {
         t = (--t) * t;
         return 1 - t * t;
     }
 
-    float easeInOutQuart(float t) {
+    static float easeInOutQuart(float t) {
         if (t < 0.5) {
             t *= t;
             return 8 * t * t;
@@ -62,17 +62,17 @@ namespace EasingFunc {
         }
     }
 
-    float easeInQuint(float t) {
+    static float easeInQuint(float t) {
         float t2 = t * t;
         return t * t2 * t2;
     }
 
-    float easeOutQuint(float t) {
+    static float easeOutQuint(float t) {
         float t2 = (--t) * t;
         return 1 + t * t2 * t2;
     }
 
-    float easeInOutQuint(float t) {
+    static float easeInOutQuint(float t) {
         float t2;
         if (t < 0.5) {
             t2 = t * t;
@@ -83,15 +83,15 @@ namespace EasingFunc {
         }
     }
 
-    float easeInExpo(float t) {
+    static float easeInExpo(float t) {
         return (pow(2, 8 * t) - 1) / 255;
     }
 
-    float easeOutExpo(float t) {
+    static float easeOutExpo(float t) {
         return 1 - pow(2, -8 * t);
     }
 
-    float easeInOutExpo(float t) {
+    static float easeInOutExpo(float t) {
         if (t < 0.5) {
             return (pow(2, 16 * t) - 1) / 510;
         } else {
@@ -99,15 +99,15 @@ namespace EasingFunc {
         }
     }
 
-    float easeInCirc(float t) {
+    static float easeInCirc(float t) {
         return 1 - sqrt(1 - t);
     }
 
-    float easeOutCirc(float t) {
+    static float easeOutCirc(float t) {
         return sqrt(t);
     }
 
-    float easeInOutCirc(float t) {
+    static float easeInOutCirc(float t) {
         if (t < 0.5) {
             return (1 - sqrt(1 - 2 * t)) * 0.5;
         } else {
@@ -115,15 +115,15 @@ namespace EasingFunc {
         }
     }
 
-    float easeInBack(float t) {
+    static float easeInBack(float t) {
         return t * t * (2.70158 * t - 1.70158);
     }
 
-    float easeOutBack(float t) {
+    static float easeOutBack(float t) {
         return 1 + (--t) * t * (2.70158 * t + 1.70158);
     }
 
-    float easeInOutBack(float t) {
+    static float easeInOutBack(float t) {
         if (t < 0.5) {
             return t * t * (7 * t - 2.5) * 2;
         } else {
@@ -131,17 +131,17 @@ namespace EasingFunc {
         }
     }
 
-    float easeInElastic(float t) {
+    static float easeInElastic(float t) {
         float t2 = t * t;
         return t2 * t2 * sin(t * PI * 4.5);
     }
 
-    float easeOutElastic(float t) {
+    static float easeOutElastic(float t) {
         float t2 = (t - 1) * (t - 1);
         return 1 - t2 * t2 * cos(t * PI * 4.5);
     }
 
-    float easeInOutElastic(float t) {
+    static float easeInOutElastic(float t) {
         float t2;
         if (t < 0.45) {
             t2 = t * t;
@@ -154,19 +154,19 @@ namespace EasingFunc {
         }
     }
 
-    float easeInBounce(float t) {
+    static float easeInBounce(float t) {
         return pow(2, 6 * (t - 1)) * abs(sin(t * PI * 3.5));
     }
 
-    float easeOutBounce(float t) {
+    static float easeOutBounce(float t) {
         return 1 - pow(2, -6 * t) * abs(cos(t * PI * 3.5));
     }
 
-    float easeInOutBounce(float t) {
+    static float easeInOutBounce(float t) {
         if (t < 0.5) {
             return 8 * pow(2, 8 * (t - 1)) * abs(sin(t * PI * 7));
         } else {
             return 1 - 8 * pow(2, -8 * t) * abs(sin(t * PI * 7));
         }
     }
-}
\ No newline at end of file
+}