diff --git a/modules/development/default.nix b/modules/development/default.nix
index a1c4fbb6..9a96a9f9 100644
--- a/modules/development/default.nix
+++ b/modules/development/default.nix
@@ -61,6 +61,10 @@
             :mode "\\.hs\\'"
             )
 
+          (use-package lsp-haskell
+            :hook (haskell-mode . lsp)
+            )
+
           ;; Folding
           (use-package origami
             :hook (prog-mode . origami-mode)
diff --git a/patches/203985.patch b/patches/203985.patch
new file mode 100644
index 00000000..75632c9b
--- /dev/null
+++ b/patches/203985.patch
@@ -0,0 +1,44 @@
+From cd8ffa2910d00f1a461c5dce4e11889544766b57 Mon Sep 17 00:00:00 2001
+From: Charlotte Van Petegem <charlotte.vanpetegem@ugent.be>
+Date: Thu, 1 Dec 2022 19:59:03 +0100
+Subject: [PATCH] matrix-appservice-slack: 2.0.1 -> 2.0.2
+
+---
+ .../matrix-synapse/matrix-appservice-slack/package.json     | 4 ++--
+ .../servers/matrix-synapse/matrix-appservice-slack/pin.json | 6 +++---
+ 2 files changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/pkgs/servers/matrix-synapse/matrix-appservice-slack/package.json b/pkgs/servers/matrix-synapse/matrix-appservice-slack/package.json
+index 1c440ad9279ef4..e52f1221327c57 100644
+--- a/pkgs/servers/matrix-synapse/matrix-appservice-slack/package.json
++++ b/pkgs/servers/matrix-synapse/matrix-appservice-slack/package.json
+@@ -1,6 +1,6 @@
+ {
+   "name": "matrix-appservice-slack",
+-  "version": "2.0.1",
++  "version": "2.0.2",
+   "description": "A Matrix <--> Slack bridge",
+   "engines": {
+     "node": ">=16 <=18"
+@@ -38,7 +38,7 @@
+     "Slackdown": "git+https://Half-Shot@github.com/half-shot/slackdown.git",
+     "axios": "^0.27.2",
+     "escape-string-regexp": "^4.0.0",
+-    "matrix-appservice-bridge": "^5.1.0",
++    "matrix-appservice-bridge": "^6.0.0",
+     "minimist": "^1.2.6",
+     "nedb": "^1.8.0",
+     "node-emoji": "^1.10.0",
+diff --git a/pkgs/servers/matrix-synapse/matrix-appservice-slack/pin.json b/pkgs/servers/matrix-synapse/matrix-appservice-slack/pin.json
+index 306f097c97a26a..f842fda7ba5f42 100644
+--- a/pkgs/servers/matrix-synapse/matrix-appservice-slack/pin.json
++++ b/pkgs/servers/matrix-synapse/matrix-appservice-slack/pin.json
+@@ -1,5 +1,5 @@
+ {
+-  "version": "2.0.1",
+-  "srcHash": "N7EzhqKL3GiuoU2d/Y33eZhKJSCvtLDRVO40mpIBEkw=",
+-  "yarnHash": "1d9kyrzcs1c54xk0yl8n3jp61l3n8dzph1d5a4daifa7ad635hv7"
++  "version": "2.0.2",
++  "srcHash": "Z8PQuAOQbQMxmso/KV9n8fu2FqzqLsADqLczmm584QQ=",
++  "yarnHash": "1ngmgr9li7jagvzfl0jq4bxqw0q1sdqh8k9wlar6q292263g287z"
+ }