diff --git a/monomer.cabal b/monomer.cabal
index dac7c1db..8c9b372c 100644
--- a/monomer.cabal
+++ b/monomer.cabal
@@ -201,7 +201,7 @@ executable books
   build-depends:
       JuicyPixels >=3.2.9 && <3.5
     , OpenGL ==3.0.*
-    , aeson >=1.4 && <1.6
+    , aeson >=1.4 && <2.1
     , async >=2.1 && <2.3
     , attoparsec >=0.12 && <0.15
     , base >=4.11 && <5
@@ -331,7 +331,7 @@ executable ticker
   build-depends:
       JuicyPixels >=3.2.9 && <3.5
     , OpenGL ==3.0.*
-    , aeson >=1.4 && <1.6
+    , aeson >=1.4 && <2.1
     , async >=2.1 && <2.3
     , attoparsec >=0.12 && <0.15
     , base >=4.11 && <5
diff --git a/package.yaml b/package.yaml
index 042918c8..5d0236b5 100644
--- a/package.yaml
+++ b/package.yaml
@@ -92,7 +92,7 @@ executables:
     ghc-options:
       - -threaded
     dependencies:
-      - aeson >= 1.4 && < 1.6
+      - aeson >= 1.4 && < 2.1
       - lens >= 4.16 && < 5.1
       - monomer
       - text-show >= 3.7 && < 3.10
@@ -104,7 +104,7 @@ executables:
     ghc-options:
       - -threaded
     dependencies:
-      - aeson >= 1.4 && < 1.6
+      - aeson >= 1.4 && < 2.1
       - lens >= 4.16 && < 5.1
       - monomer
       - scientific >= 0.3 && < 0.4