diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # Changelog for interval-algebra
 
+## 2.1.1
+
+* Makes the version bounds on the `time` package
+consistent among project components.
+
 ## 2.1.0
 
 * Changes the type signature of the `Intervallic` typeclass.
diff --git a/interval-algebra.cabal b/interval-algebra.cabal
--- a/interval-algebra.cabal
+++ b/interval-algebra.cabal
@@ -1,6 +1,6 @@
 cabal-version:  2.2
 name:           interval-algebra
-version:        2.1.0
+version:        2.1.1
 synopsis:       An implementation of Allen's interval algebra for temporal logic
 description:    Please see the README on GitHub at <https://github.com/novisci/interval-algebra>
 category:       Algebra,Time
@@ -118,6 +118,6 @@
     , containers ^>= 0.6
     , interval-algebra
     , prettyprinter ^>= 1.7
-    , time ^>= 1.9
+    , time >= 1.9 && < 2
     , witch ^>= 1.0
   default-language: Haskell2010