diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,14 @@
+2015-06-19 Ivan Perez <ivan.perez@keera.co.uk>
+        * src:/ instances of DeepSeq (see #5).
+        * Yampa.cabal: Deepseq added to dependencies. Version bump (0.10.2).
+
+2015-05-06 Ivan Perez <ivan.perez@keera.co.uk>
+        * Yampa.cabal: disables tests by default. Version bump (0.10.1.1).
+
+2015-05-05 Ivan Perez <ivan.perez@keera.co.uk>
+        * Yampa.cabal: exposes internal modules for documentation purposes.
+          Version bump (0.10.1)
+
 2015-05-05 Ivan Perez <ivan.perez@keera.co.uk>
         * src/: Reorders code. Marks modules as deprecated. Removes useless functions.
         * Yampa.cabal: version bump (0.10.0)
diff --git a/Yampa.cabal b/Yampa.cabal
--- a/Yampa.cabal
+++ b/Yampa.cabal
@@ -1,5 +1,5 @@
 name: Yampa
-version: 0.10.1.1
+version: 0.10.2
 cabal-version: >= 1.8
 license: BSD3
 license-file: LICENSE
@@ -43,7 +43,7 @@
 library
   hs-source-dirs:  src
   ghc-options : -O3 -Wall -fno-warn-name-shadowing
-  build-Depends: base < 5, random
+  build-Depends: base < 5, random, deepseq
   exposed-modules:
     -- Main FRP modules
     FRP.Yampa
diff --git a/src/FRP/Yampa/Event.hs b/src/FRP/Yampa/Event.hs
--- a/src/FRP/Yampa/Event.hs
+++ b/src/FRP/Yampa/Event.hs
@@ -78,6 +78,8 @@
 -- (==)     :: Event a -> Event a -> Bool
 -- (<=) :: Event a -> Event a -> Bool
 
+import Control.DeepSeq (NFData(..))
+
 import FRP.Yampa.Diagnostics
 import FRP.Yampa.Forceable
 
@@ -161,6 +163,12 @@
     force ea@NoEvent   = ea
     force ea@(Event a) = force a `seq` ea
 
+------------------------------------------------------------------------------
+-- NFData instance
+------------------------------------------------------------------------------
+instance NFData a => NFData (Event a) where
+    rnf NoEvent   = ()
+    rnf (Event a) = rnf a `seq` ()
 
 ------------------------------------------------------------------------------
 -- Internal utilities for event construction
diff --git a/tests/AFRPTestsFirstSecond.hs b/tests/AFRPTestsFirstSecond.hs
--- a/tests/AFRPTestsFirstSecond.hs
+++ b/tests/AFRPTestsFirstSecond.hs
@@ -13,6 +13,8 @@
 
 module AFRPTestsFirstSecond (first_trs, first_tr, second_trs, second_tr) where
 
+import Data.Tuple (swap)
+
 import FRP.Yampa
 
 import AFRPTestsCommon
diff --git a/tests/AFRPTestsLoopLaws.hs b/tests/AFRPTestsLoopLaws.hs
--- a/tests/AFRPTestsLoopLaws.hs
+++ b/tests/AFRPTestsLoopLaws.hs
@@ -13,6 +13,8 @@
 
 module AFRPTestsLoopLaws (looplaws_trs, looplaws_tr) where
 
+import Data.Tuple(swap)
+
 import FRP.Yampa
 
 import AFRPTestsCommon
diff --git a/tests/AFRPTestsSwitch.hs b/tests/AFRPTestsSwitch.hs
--- a/tests/AFRPTestsSwitch.hs
+++ b/tests/AFRPTestsSwitch.hs
@@ -13,8 +13,8 @@
 module AFRPTestsSwitch (switch_tr, switch_trs) where
 
 import FRP.Yampa
+import FRP.Yampa.EventS
 import FRP.Yampa.Internals (Event(NoEvent, Event))
-import FRP.Yampa.Utilities (snap)
 
 import AFRPTestsCommon
 
diff --git a/tests/AFRPTestsUtils.hs b/tests/AFRPTestsUtils.hs
--- a/tests/AFRPTestsUtils.hs
+++ b/tests/AFRPTestsUtils.hs
@@ -17,7 +17,12 @@
 
 import FRP.Yampa
 import FRP.Yampa.Internals (Event(NoEvent, Event))
+import FRP.Yampa.Conditional
+import FRP.Yampa.Integration
+import FRP.Yampa.EventS
+import FRP.Yampa.Hybrid
 import FRP.Yampa.Utilities
+import FRP.Yampa.Switches
 
 import AFRPTestsCommon