--- a/clash-lib.cabal
+++ b/clash-lib.cabal
@@ -127,7 +127,6 @@ Library
                       TemplateHaskell
 
   Build-depends:      aeson                   >= 0.6.2.0  && < 2.3,
-                      attoparsec-aeson        >= 2.1      && < 2.3,
                       aeson-pretty            >= 0.8      && < 0.9,
                       ansi-terminal           >= 0.8.0.0  && < 0.12,
                       array,
@@ -308,7 +307,6 @@ executable v16-upgrade-primitives
   Build-Depends:
     base,
     aeson,
-    attoparsec-aeson,
     deepseq,
     yaml,
     bytestring,
@@ -338,7 +336,6 @@ test-suite unittests
       ghc-typelits-knownnat,
 
       aeson,
-      attoparsec-aeson,
       aeson-pretty,
       base,
       base16-bytestring,
