diff --git a/aivika-experiment-cairo.cabal b/aivika-experiment-cairo.cabal
--- a/aivika-experiment-cairo.cabal
+++ b/aivika-experiment-cairo.cabal
@@ -1,5 +1,5 @@
 name:            aivika-experiment-cairo
-version:         1.4
+version:         2.1
 synopsis:        Cairo backend for the Aivika simulation library
 description:
     This package complements the Aivika and Aivika Experiment packages 
@@ -23,8 +23,8 @@
     build-depends:   base >= 3 && < 6,
                      Chart >= 1.3.1,
                      Chart-cairo >= 1.3.1,
-                     aivika-experiment >= 1.4,
-                     aivika-experiment-chart >= 1.4
+                     aivika-experiment >= 2.1,
+                     aivika-experiment-chart >= 2.1
 
     extensions:      MultiParamTypeClasses