diff --git a/source/_base.css b/source/_base.css
index 630dc79..d0292fc 100644
--- a/source/_base.css
+++ b/source/_base.css
@@ -6,14 +6,3 @@
 .animated.infinite {
   animation-iteration-count: infinite;
 }
-
-.animated.hinge {
-  animation-duration: 2s;
-}
-
-.animated.flipOutX,
-.animated.flipOutY,
-.animated.bounceIn,
-.animated.bounceOut {
-  animation-duration: .75s;
-}
diff --git a/source/bouncing_entrances/bounceIn.css b/source/bouncing_entrances/bounceIn.css
index 9f253a1..4a458f1 100644
--- a/source/bouncing_entrances/bounceIn.css
+++ b/source/bouncing_entrances/bounceIn.css
@@ -32,5 +32,6 @@
 }
 
 .bounceIn {
+  animation-duration: .75s;
   animation-name: bounceIn;
 }
diff --git a/source/bouncing_exits/bounceOut.css b/source/bouncing_exits/bounceOut.css
index b170c28..78ad97e 100644
--- a/source/bouncing_exits/bounceOut.css
+++ b/source/bouncing_exits/bounceOut.css
@@ -15,5 +15,6 @@
 }
 
 .bounceOut {
+  animation-duration: .75s;
   animation-name: bounceOut;
 }
diff --git a/source/flippers/flipOutX.css b/source/flippers/flipOutX.css
index ffa0fcf..a6805b2 100644
--- a/source/flippers/flipOutX.css
+++ b/source/flippers/flipOutX.css
@@ -15,6 +15,7 @@
 }
 
 .flipOutX {
+  animation-duration: .75s;
   animation-name: flipOutX;
   backface-visibility: visible !important;
 }
diff --git a/source/flippers/flipOutY.css b/source/flippers/flipOutY.css
index b004cae..401712c 100644
--- a/source/flippers/flipOutY.css
+++ b/source/flippers/flipOutY.css
@@ -15,6 +15,7 @@
 }
 
 .flipOutY {
+  animation-duration: .75s;
   backface-visibility: visible !important;
   animation-name: flipOutY;
 }
diff --git a/source/specials/hinge.css b/source/specials/hinge.css
index 56ec58a..71c55f6 100644
--- a/source/specials/hinge.css
+++ b/source/specials/hinge.css
@@ -24,5 +24,6 @@
 }
 
 .hinge {
+  animation-duration: 2s;
   animation-name: hinge;
 }