diff --git a/lua/custom/mappings.lua b/lua/custom/mappings.lua
index 8df6cb5..f160224 100644
--- a/lua/custom/mappings.lua
+++ b/lua/custom/mappings.lua
@@ -388,8 +388,8 @@ M.edit = {
     ["<leader>s"] = { "s", "replace with insert mode" },
 
     -- split and join lines
-    ["<C-j>"] = { "<cmd>join<cr>", "join lines" },
-    ["<C-s>"] = { "i<cr><esc>l", "split line" },
+    ["<C-J>"] = { "<cmd>join<cr>", "join lines" },
+    ["<C-S>"] = { "i<cr><esc>l", "split line" },
 
     -- do something useful with the arrows
     ["<Up>"] = { "<cmd> move-2<cr>", "Move line up" },
diff --git a/lua/custom/plugins.lua b/lua/custom/plugins.lua
index 3a43484..a8ee7c6 100644
--- a/lua/custom/plugins.lua
+++ b/lua/custom/plugins.lua
@@ -627,8 +627,8 @@ local plugins = {
     lazy = false,
     cmd = { "TSJJoin", "TSJSplit" },
     keys = {
-      { "<C-j>", "<cmd>TSJJoin<CR>" },
-      { "<C-s>", "<cmd>TSJSplit<CR>" },
+      { "<C-J>", "<cmd>TSJJoin<CR>" },
+      { "<C-S>", "<cmd>TSJSplit<CR>" },
     },
   },
   {