diff --git a/servant-client/servant-client.cabal b/servant-client/servant-client.cabal
index 2dfc4403..089e1209 100644
--- a/servant-client/servant-client.cabal
+++ b/servant-client/servant-client.cabal
@@ -36,7 +36,7 @@ library
     Servant.Common.Req
   build-depends:
       base                  >= 4.7      && < 4.10
-    , aeson                 >= 0.7      && < 0.12
+    , aeson                 >= 0.7      && < 1.1
     , attoparsec            >= 0.12     && < 0.14
     , base64-bytestring     >= 1.0.0.1  && < 1.1
     , bytestring            >= 0.10     && < 0.11
diff --git a/servant-js/servant-js.cabal b/servant-js/servant-js.cabal
index d29dc96c..726e0b4e 100644
--- a/servant-js/servant-js.cabal
+++ b/servant-js/servant-js.cabal
@@ -65,7 +65,7 @@ executable counter
     buildable: False
 
   build-depends:    base             >= 4.7 && < 5
-                  , aeson            >= 0.7  && < 0.12
+                  , aeson            >= 0.7  && < 1.1
                   , filepath         >= 1
                   , lens             >= 4
                   , servant          == 0.8.*
diff --git a/servant-server/servant-server.cabal b/servant-server/servant-server.cabal
index 66a18577..ff84d947 100644
--- a/servant-server/servant-server.cabal
+++ b/servant-server/servant-server.cabal
@@ -47,7 +47,7 @@ library
   build-depends:
         base               >= 4.7  && < 4.10
       , base-compat        >= 0.9  && < 0.10
-      , aeson              >= 0.7  && < 0.12
+      , aeson              >= 0.7  && < 1.1
       , attoparsec         >= 0.12 && < 0.14
       , base64-bytestring  >= 1.0  && < 1.1
       , bytestring         >= 0.10 && < 0.11
diff --git a/servant/servant.cabal b/servant/servant.cabal
index 48784cac..3c89171f 100644
--- a/servant/servant.cabal
+++ b/servant/servant.cabal
@@ -51,7 +51,7 @@ library
   build-depends:
       base                  >= 4.7  && < 4.10
     , base-compat           >= 0.9  && < 0.10
-    , aeson                 >= 0.7  && < 0.12
+    , aeson                 >= 0.7  && < 1.1
     , attoparsec            >= 0.12 && < 0.14
     , bytestring            >= 0.10 && < 0.11
     , bytestring-conversion >= 0.3  && < 0.4