diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+## [0.1.3.11] - 2020-11-08
+### Changed
+- Allow `linear-0.21`.
+
 ## [0.1.3.10] - 2020-11-06
 ### Fixed
 - `SOURCE` and `ORIGIN` in GB parser.
diff --git a/cobot-io.cabal b/cobot-io.cabal
--- a/cobot-io.cabal
+++ b/cobot-io.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 7812eda294db70053683641ccf7a28ce152e843de09376f47a6bc6d2d1a86db2
+-- hash: 4a6f3015c17c537b110962a77c5d6d5da84a9a9a01620acfb07850485afca69a
 
 name:           cobot-io
-version:        0.1.3.10
+version:        0.1.3.11
 synopsis:       Biological data file formats and IO
 description:    Please see the README on GitHub at <https://github.com/biocad/cobot-io#readme>
 category:       Bio
@@ -86,7 +86,7 @@
     , http-conduit >=2.3 && <2.4
     , hyraxAbif >=0.2.3.15 && <0.2.4.0
     , lens >=4.16 && <5.0
-    , linear >=1.20 && <1.21
+    , linear >=1.20 && <1.22
     , mtl >=2.2.1 && <2.3.0
     , split
     , text >=1.2.2.1 && <1.3
@@ -133,7 +133,7 @@
     , http-conduit >=2.3 && <2.4
     , hyraxAbif >=0.2.3.15 && <0.2.4.0
     , lens >=4.16 && <5.0
-    , linear >=1.20 && <1.21
+    , linear
     , mtl >=2.2.1 && <2.3.0
     , neat-interpolation >=0.3
     , split
diff --git a/test/MAESpec.hs b/test/MAESpec.hs
--- a/test/MAESpec.hs
+++ b/test/MAESpec.hs
@@ -27,20 +27,20 @@
         let secondChainResidues Model{..} = (chainResidues $ modelChains V.! 1)
 
         it "two chains" $ \Model{..} -> length modelChains `shouldBe` 2
-        
-        it "residue numbers" $ \m@Model{..} -> do
+
+        it "residue numbers" $ \m -> do
             fmap resName (firstChainResidues m) `shouldBe` V.fromList ["ACE", "ASP", "ILE", "LYS"]
             fmap resName (secondChainResidues m) `shouldBe` V.fromList ["GLU", "LEU", "VAL", "ARG", "PRO", "GLY", "ALA", "LEU", "VAL"]
-        
-        it "residue names" $ \m@Model{..} -> do
+
+        it "residue names" $ \m -> do
             fmap resNumber (firstChainResidues m) `shouldBe` V.fromList [0, 1, 2, 3]
             fmap resNumber (secondChainResidues m) `shouldBe` V.fromList [10, 11, 12, 13, 13, 15, 16, 17, 18] -- 13 is doubled because the second 13 has 'A' insertion code
 
-        it "residue insertion codes" $ \m@Model{..} -> do
+        it "residue insertion codes" $ \m -> do
             fmap resInsertionCode (firstChainResidues m) `shouldBe` V.fromList [' ', ' ', ' ', ' ']
             fmap resInsertionCode (secondChainResidues m) `shouldBe` V.fromList [' ', ' ', ' ', ' ', 'A', ' ', ' ', ' ', ' ']
 
-        it "atoms count" $ \m@Model{..} -> do
+        it "atoms count" $ \m -> do
             sum (fmap (length . resAtoms) (firstChainResidues m)) `shouldBe` 62
             sum (fmap (length . resAtoms) (secondChainResidues m)) `shouldBe` 140
 
@@ -68,7 +68,7 @@
         let residue1 m = firstChainResidues m V.! 3
         let residue2 m = secondChainResidues m V.! 0
 
-        it "atoms in residues" $ \m@Model{..} -> do
+        it "atoms in residues" $ \m -> do
             let atoms1 = resAtoms $ residue1 m
             let atoms2 = resAtoms $ residue2 m
 
@@ -94,7 +94,7 @@
                                                          , V3 (-10.322000) 11.996000 16.297000, V3 (-9.798000) 11.676000 19.305000, V3 (-10.128000) 10.318000 18.313000, V3 (-12.084000) 12.633000 18.684000, V3 (-12.123000) 11.111000 19.544000
                                                          ]
 
-        it "bonds in residues" $ \m@Model{..} -> do
+        it "bonds in residues" $ \m -> do
             toSet (resBonds $ residue1 m) `shouldBe` toSet (V.fromList $ toBond LocalID . (\(x, y, o) -> (x - 37, y - 37, o)) <$> filter (\(x, y, _) -> x - 1 `elem` [37 .. 58] && y - 1 `elem` [37 .. 58]) allBonds)
             toSet (resBonds $ residue2 m) `shouldBe` toSet (V.fromList $ toBond LocalID . (\(x, y, o) -> (x - 59, y - 59, o)) <$> filter (\(x, y, _) -> x - 1 `elem` [59 .. 73] && y - 1 `elem` [59 .. 73]) allBonds)
     where