diff --git a/oeis2.cabal b/oeis2.cabal
--- a/oeis2.cabal
+++ b/oeis2.cabal
@@ -1,13 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.34.4.
+-- This file has been generated from package.yaml by hpack version 0.36.0.
 --
 -- see: https://github.com/sol/hpack
---
--- hash: d12ab6c84c2584d3b6f205f5db01501658692c007dbabf678896c297b60ea3bc
 
 name:           oeis2
-version:        1.0.7
+version:        1.0.8
 synopsis:       Interface for Online Encyclopedia of Integer Sequences (OEIS).
 description:    Release notes are here https://github.com/23prime/oeis2/releases
 category:       Math
@@ -36,14 +34,14 @@
   hs-source-dirs:
       src
   build-depends:
-      aeson >=1.1 && <2.1
-    , base >=4.7 && <5
+      aeson ==2.*
+    , base >=4.17 && <5
     , containers >=0.5 && <0.7
-    , http-conduit >=2.2 && <2.4
+    , http-conduit >=2.2 && <3
     , lens >=4.15 && <6
-    , lens-aeson >=1.0 && <2
-    , text ==1.2.*
-    , vector ==0.12.*
+    , lens-aeson >=1.2 && <2
+    , text ==2.*
+    , vector ==0.13.*
   default-language: Haskell2010
 
 test-suite oeis2-test
@@ -56,14 +54,14 @@
   ghc-options: -threaded -rtsopts -with-rtsopts=-N
   build-depends:
       QuickCheck
-    , aeson >=1.1 && <2.1
-    , base >=4.7 && <5
+    , aeson ==2.*
+    , base >=4.17 && <5
     , containers >=0.5 && <0.7
     , hspec
-    , http-conduit >=2.2 && <2.4
+    , http-conduit >=2.2 && <3
     , lens >=4.15 && <6
-    , lens-aeson >=1.0 && <2
+    , lens-aeson >=1.2 && <2
     , oeis2
-    , text ==1.2.*
-    , vector ==0.12.*
+    , text ==2.*
+    , vector ==0.13.*
   default-language: Haskell2010
diff --git a/src/Math/OEIS/Internal.hs b/src/Math/OEIS/Internal.hs
--- a/src/Math/OEIS/Internal.hs
+++ b/src/Math/OEIS/Internal.hs
@@ -6,6 +6,7 @@
 import           Control.Lens        ((^?), (^?!))
 import           Control.Monad       (when)
 import           Data.Aeson.Lens
+import           Data.Aeson.Key      (fromText)
 import           Data.Aeson.Types
 import           Data.Char
 import           Data.Functor
@@ -121,7 +122,7 @@
 
 getIntData :: Value -> T.Text -> (T.Text, Maybe OEISData)
 getIntData result k
-  = let d = result ^? key k ._Integer
+  = let d = result ^? key (fromText k) ._Integer
     in case d of
       Nothing -> (k, Nothing)
       _       ->
@@ -133,7 +134,7 @@
 
 getTextData :: Value -> T.Text -> (T.Text, Maybe OEISData)
 getTextData result k
-  = let d = result ^? key k ._String
+  = let d = result ^? key (fromText k) ._String
     in case d of
       Nothing -> (k, Nothing)
       _       ->
@@ -147,11 +148,11 @@
 
 getTextsData :: Value -> T.Text -> (T.Text, Maybe OEISData)
 getTextsData result k
-  = let ds  = result ^? key k . _Array
+  = let ds  = result ^? key (fromText k) . _Array
     in case ds of
       Nothing -> (k, Nothing)
       _       ->
-        let ts  = (\i -> result ^?! key k . nth i . _String) <$> [0..(len - 1)]
+        let ts  = (\i -> result ^?! key (fromText k) . nth i . _String) <$> [0..(len - 1)]
             len = fromJust $ V.length <$> ds
         in case k of
           "program" -> let prgs = parsePrograms emptyProgram [] ts