diff --git a/hasbolt.cabal b/hasbolt.cabal
--- a/hasbolt.cabal
+++ b/hasbolt.cabal
@@ -1,6 +1,6 @@
 cabal-version: >=1.10
 name: hasbolt
-version: 0.1.3.5
+version: 0.1.3.6
 license: BSD3
 license-file: LICENSE
 copyright: (c) 2018 Pavel Yakovlev
diff --git a/src/Database/Bolt/Value/Type.hs b/src/Database/Bolt/Value/Type.hs
--- a/src/Database/Bolt/Value/Type.hs
+++ b/src/Database/Bolt/Value/Type.hs
@@ -57,6 +57,9 @@
 instance IsValue () where
   toValue = N
 
+instance IsValue Bool where
+  toValue = B
+
 instance IsValue Int where
   toValue = I