diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+## [0.1.2.2] - 2019-12-25
+### Fixed
+- wrike-438378826: CHO codon table fixed
+
 ## [0.1.2.1] - 2019-12-9
 ### Changed
 - changed `forbidden` parameter type
diff --git a/cobot-tools.cabal b/cobot-tools.cabal
--- a/cobot-tools.cabal
+++ b/cobot-tools.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: f2ccf441623f2e23d11376c3e75ce4d4f1cdd056329f2470c7113e541c1dddcb
+-- hash: 84a7b89a1041e9805b22b527f40e7624a4313d166c84a98dae62d1025b096246
 
 name:           cobot-tools
-version:        0.1.2.1
+version:        0.1.2.2
 synopsis:       Biological data file formats and IO
 description:    Please see the README on GitHub at <https://github.com/less-wrong/cobot-tools#readme>
 category:       Bio
diff --git a/src/Bio/Tools/Sequence/CodonOptimization/Constants.hs b/src/Bio/Tools/Sequence/CodonOptimization/Constants.hs
--- a/src/Bio/Tools/Sequence/CodonOptimization/Constants.hs
+++ b/src/Bio/Tools/Sequence/CodonOptimization/Constants.hs
@@ -167,26 +167,26 @@
 -- taken from https://www.genscript.com/tools/codon-frequency-table
 ak2MaxFrequCodon CHO =
     fromList
-        [ (ALA, ([DG, DC, DC], 0.26))
-        , (CYS, ([DT, DG, DC], 0.54))
-        , (ASP, ([DG, DA, DT], 0.63))
-        , (GLU, ([DG, DA, DA], 0.68))
-        , (PHE, ([DT, DT, DT], 0.58))
-        , (GLY, ([DG, DG, DC], 0.37))
-        , (HIS, ([DC, DA, DT], 0.57))
-        , (ILE, ([DA, DT, DT], 0.49))
-        , (LYS, ([DA, DA, DA], 0.74))
-        , (LEU, ([DC, DT, DG], 0.47))
+        [ (ALA, ([DG, DC, DC], 0.37))
+        , (CYS, ([DT, DG, DC], 0.53))
+        , (ASP, ([DG, DA, DC], 0.53))
+        , (GLU, ([DG, DA, DG], 0.59))
+        , (PHE, ([DT, DT, DC], 0.53))
+        , (GLY, ([DG, DG, DC], 0.34))
+        , (HIS, ([DC, DA, DC], 0.56))
+        , (ILE, ([DA, DT, DC], 0.51))
+        , (LYS, ([DA, DA, DG], 0.61))
+        , (LEU, ([DC, DT, DG], 0.39))
         , (MET, ([DA, DT, DG], 1.0))
-        , (ASN, ([DA, DA, DC], 0.51))
-        , (PRO, ([DC, DC, DG], 0.49))
-        , (GLN, ([DC, DA, DG], 0.66))
-        , (ARG, ([DC, DG, DC], 0.36))
-        , (SER, ([DA, DG, DC], 0.25))
-        , (THR, ([DA, DC, DC], 0.4))
-        , (VAL, ([DG, DT, DG], 0.35))
+        , (ASN, ([DA, DA, DC], 0.55))
+        , (PRO, ([DC, DC, DC], 0.32))
+        , (GLN, ([DC, DA, DG], 0.76))
+        , (ARG, ([DC, DG, DG], 0.19))
+        , (SER, ([DA, DG, DC], 0.22))
+        , (THR, ([DA, DC, DC], 0.37))
+        , (VAL, ([DG, DT, DG], 0.46))
         , (TRP, ([DT, DG, DG], 1.0))
-        , (TYR, ([DT, DA, DT], 0.59))
+        , (TYR, ([DT, DA, DC], 0.56))
         ]
 
 codonFrequencies :: Organism -> Map [DNA] Double
diff --git a/test/SpecCodonOptimization.hs b/test/SpecCodonOptimization.hs
--- a/test/SpecCodonOptimization.hs
+++ b/test/SpecCodonOptimization.hs
@@ -120,7 +120,7 @@
         nk <- toRandomNKSequ ak
         let res = optimizeAA confCHO ak
 
-        res `shouldBe` "GCCAGCACCAAGGGCCCCAGCGTGTTTCCTCTGGCCCCTTCTTCTAAGTCTACCTCTGGCGGCACCGCCGCCCTGGGCTGTCTGGTGAAGGATTACTTTCCTGAGCCTGTGACCGTGTCTTGGAACTCTGGCGCCCTGACCTCTGGCGTGCACACCTTTCCTGCCGTGCTGCAGTCTTCTGGCCTGTACTCTCTGTCTTCTGTGGTGACCGTGCCTTCTTCTTCTCTGGGCACCCAGACCTACATCTGCAACGTGAACCACAAGCCTTCTAACACCAAGGTGGACAAGAAGGTG"
+        res `shouldBe` "GCCAGCACCAAGGGCCCCAGCGTGTTTCCTCTGGCCCCTTCTTCTAAGTCTACCTCTGGCGGCACCGCCGCCCTGGGCTGTCTGGTGAAGGATTACTTCCCTGAGCCTGTGACCGTGTCTTGGAACTCTGGCGCCCTGACCTCTGGCGTGCACACCTTCCCTGCCGTGCTGCAGTCTTCTGGCCTGTACTCTCTGTCTTCTGTGGTGACCGTGCCTTCTTCTTCTCTGGGCACCCAGACCTACATCTGCAACGTGAACCACAAGCCTTCTAACACCAAGGTGGACAAGAAGGTG"
         res `assertScoreByCHOBetterThan` nk
 
 optimizeSequenceForEColi :: Spec