diff --git a/.available-versions b/.available-versions
index a8a0396..f4861f7 100644
--- a/.available-versions
+++ b/.available-versions
@@ -12,6 +12,7 @@
 ghc              8.0.2    8.0
 ghc              8.2.2    8.2
 ghc              8.4.1
+ghc              8.4.2
 ghc              8.4.3
 ghc              8.4.4    8.4
 ghc              8.6.1    bad
diff --git a/.download-urls b/.download-urls
index e904492..b5f6ee0 100644
--- a/.download-urls
+++ b/.download-urls
@@ -39,6 +39,15 @@ ghc 8.4.1   x86_64  freebsd=11,freebsd                             https://downl
 ghc 8.4.1   i386    alpine                                         https://github.com/redneb/ghc-alt-libc/releases/download/ghc-8.4.1-musl/ghc-8.4.1-i386-unknown-linux-musl.tar.xz
 ghc 8.4.1   x86_64  alpine                                         https://github.com/redneb/ghc-alt-libc/releases/download/ghc-8.4.1-musl/ghc-8.4.1-x86_64-unknown-linux-musl.tar.xz
 
+ghc 8.4.2   i386    debian=8,debian,ubuntu,mint,unknown            https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-i386-deb8-linux.tar.xz
+ghc 8.4.2   x86_64  debian=8                                       https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-x86_64-deb8-linux.tar.xz
+ghc 8.4.2   x86_64  debian=9,debian,ubuntu=16.04,ubuntu=18.04,mint https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-x86_64-deb9-linux.tar.xz
+ghc 8.4.2   x86_64  fedora=27,fedora,ubuntu,unknown                https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-x86_64-fedora27-linux.tar.xz
+ghc 8.4.2   x86_64  darwin                                         https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-x86_64-apple-darwin.tar.xz
+ghc 8.4.2   x86_64  freebsd                                        https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-x86_64-portbld-freebsd.tar.xz
+ghc 8.4.2   i386    alpine                                         https://github.com/redneb/ghc-alt-libc/releases/download/ghc-8.4.2-musl/ghc-8.4.2-i386-unknown-linux-musl.tar.xz
+ghc 8.4.2   x86_64  alpine                                         https://github.com/redneb/ghc-alt-libc/releases/download/ghc-8.4.2-musl/ghc-8.4.2-x86_64-unknown-linux-musl.tar.xz
+
 ghc 8.4.3   i386    debian=8,debian,ubuntu,mint,unknown            https://downloads.haskell.org/~ghc/8.4.3/ghc-8.4.3-i386-deb8-linux.tar.xz
 ghc 8.4.3   x86_64  debian=8                                       https://downloads.haskell.org/~ghc/8.4.3/ghc-8.4.3-x86_64-deb8-linux.tar.xz
 ghc 8.4.3   x86_64  debian=9,debian,ubuntu=16.04,ubuntu=18.04,mint https://downloads.haskell.org/~ghc/8.4.3/ghc-8.4.3-x86_64-deb9-linux.tar.xz