diff --git a/.circleci/config.yml b/.circleci/config.yml
index 35d6e66..42d610c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -15,10 +15,6 @@ workflows:
       - stack-build/build-test-lint:
           <<: *defaults
           name: "default"
-      - stack-build/build-test-lint:
-          <<: *defaults
-          name: "ghc-8.4.3 / lts-12.2"
-          stack-yaml: stack-lts-12.2.yaml
       - stack-build/build-test-lint:
           <<: *defaults
           name: "ghc-8.6.3 / lts-13.2"
diff --git a/stack-lts-12.2.yaml b/stack-lts-12.2.yaml
deleted file mode 100644
index 8d84c21..0000000
--- a/stack-lts-12.2.yaml
+++ /dev/null
@@ -1,14 +0,0 @@
----
-resolver: lts-12.2
-extra-deps:
-  - hoauth2-1.14.0@sha256:fcb4284fc78950c91d5b548317c51bd99a5ced84f4bb9e6153624b5783e4215f,5628
-  - uri-bytestring-aeson-0.1.0.8@sha256:8c830d995acf092b7c6e46607095917d2fbf0842d2409c8e3c85bf555a723364,1083
-
-# Fix for weeder with stack-2
-ghc-options:
-  "$locals":
-    -ddump-to-file
-    -ddump-hi
-
-# needed because different packages want different Cabal
-allow-newer: true
diff --git a/stack-lts-12.2.yaml.lock b/stack-lts-12.2.yaml.lock
deleted file mode 100644
index c01551d..0000000
--- a/stack-lts-12.2.yaml.lock
+++ /dev/null
@@ -1,26 +0,0 @@
-# This file was autogenerated by Stack.
-# You should not edit this file by hand.
-# For more information, please see the documentation at:
-#   https://docs.haskellstack.org/en/stable/lock_files
-
-packages:
-- completed:
-    hackage: hoauth2-1.14.0@sha256:fcb4284fc78950c91d5b548317c51bd99a5ced84f4bb9e6153624b5783e4215f,5628
-    pantry-tree:
-      size: 2046
-      sha256: f25e2c2c101312196159dad5a3e2a4c8f549ed2d036d9566b66786d758db7dba
-  original:
-    hackage: hoauth2-1.14.0@sha256:fcb4284fc78950c91d5b548317c51bd99a5ced84f4bb9e6153624b5783e4215f,5628
-- completed:
-    hackage: uri-bytestring-aeson-0.1.0.8@sha256:8c830d995acf092b7c6e46607095917d2fbf0842d2409c8e3c85bf555a723364,1083
-    pantry-tree:
-      size: 330
-      sha256: af6eb6b9c28e17d783904eb657a5937a5f7ebf8e3ee3d8d5a1283f75a9ec5f1d
-  original:
-    hackage: uri-bytestring-aeson-0.1.0.8@sha256:8c830d995acf092b7c6e46607095917d2fbf0842d2409c8e3c85bf555a723364,1083
-snapshots:
-- completed:
-    size: 499199
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/12/2.yaml
-    sha256: a322089fb83fcbccca0dbcfa843c91aa07826fa1c6a57a569ba7574e6e95c7f0
-  original: lts-12.2