diff --git a/crf-chain1-constrained.cabal b/crf-chain1-constrained.cabal
--- a/crf-chain1-constrained.cabal
+++ b/crf-chain1-constrained.cabal
@@ -1,5 +1,5 @@
 name:               crf-chain1-constrained
-version:            0.2.0
+version:            0.2.1
 synopsis:           First-order, constrained, linear-chain conditional random fields
 description:
     The library provides efficient implementation of the first-order,
@@ -47,7 +47,7 @@
       , binary
       , vector-binary
       , data-lens
-      , sgd >= 0.3 && < 0.4
+      , sgd >= 0.3.2 && < 0.4
 
     exposed-modules:
         Data.CRF.Chain1.Constrained