diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+2024-07-07
+        * Version bump (3.20). (#522)
+        * Update README to reflect support for GHC 9.8. (#518)
+
 2024-05-07
         * Version bump (3.19.1). (#512)
 
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@
 On other Linux distributions or older Debian-based distributions, to use
 Copilot you must install a Haskell compiler (GHC) and the package manager
 Cabal. We currently support all versions of GHC from 8.6.5 to modern versions
-(9.6 as of this writing). You can install the toolchain using
+(9.8 as of this writing). You can install the toolchain using
 [ghcup](https://www.haskell.org/ghcup/) or, if you are on Debian/Ubuntu,
 directly with `apt-get`:
 
diff --git a/copilot.cabal b/copilot.cabal
--- a/copilot.cabal
+++ b/copilot.cabal
@@ -1,5 +1,5 @@
 name:                copilot
-version:             3.19.1
+version:             3.20
 cabal-version:       >= 1.10
 license:             BSD3
 license-file:        LICENSE
@@ -47,17 +47,17 @@
       -Wall
       -fno-warn-orphans
     build-depends:
-                       base                  >= 4.9    && < 5
-                     , optparse-applicative  >= 0.14   && < 0.19
-                     , directory             >= 1.3    && < 1.4
-                     , filepath              >= 1.4    && < 1.5
+                       base                  >= 4.9  && < 5
+                     , optparse-applicative  >= 0.14 && < 0.19
+                     , directory             >= 1.3  && < 1.4
+                     , filepath              >= 1.4  && < 1.5
 
-                     , copilot-core          >= 3.19.1 && < 3.20
-                     , copilot-theorem       >= 3.19.1 && < 3.20
-                     , copilot-language      >= 3.19.1 && < 3.20
-                     , copilot-libraries     >= 3.19.1 && < 3.20
-                     , copilot-c99           >= 3.19.1 && < 3.20
-                     , copilot-prettyprinter >= 3.19.1 && < 3.20
+                     , copilot-core          >= 3.20 && < 3.21
+                     , copilot-theorem       >= 3.20 && < 3.21
+                     , copilot-language      >= 3.20 && < 3.21
+                     , copilot-libraries     >= 3.20 && < 3.21
+                     , copilot-c99           >= 3.20 && < 3.21
+                     , copilot-prettyprinter >= 3.20 && < 3.21
 
 
     exposed-modules: Language.Copilot, Language.Copilot.Main