diff --git a/Project.toml b/Project.toml
index ba66ea8..bfa2556 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "GCMAES"
 uuid = "4aa9d100-eb0f-11e8-15f1-25748831eb3b"
 authors = ["Yao Lu <luyaocns@gmail.com>"]
-version = "0.1.28"
+version = "0.1.29"
 
 [deps]
 BSON = "fbb218c0-5317-5bc6-957e-2ee96dd4b1f0"
diff --git a/src/mpi.jl b/src/mpi.jl
index 870fef3..4770066 100644
--- a/src/mpi.jl
+++ b/src/mpi.jl
@@ -113,7 +113,7 @@ end
 
 function splitcomm(comm, n)
     wsize, rank = worldsize(comm), myrank(comm)
-    if wsize > n
+    if wsize >= n
         glbl = MPI.Comm_split(comm, rank % n, rank)
         lcl = MPI.Comm_split(comm, rank ÷ n, rank)
     else