diff --git a/apps/elixir_ls_debugger/lib/debugger/cli.ex b/apps/elixir_ls_debugger/lib/debugger/cli.ex
index 9829808df..de9ffb780 100644
--- a/apps/elixir_ls_debugger/lib/debugger/cli.ex
+++ b/apps/elixir_ls_debugger/lib/debugger/cli.ex
@@ -7,7 +7,7 @@ defmodule ElixirLS.Debugger.CLI do
     WireProtocol.intercept_output(&Output.debuggee_out/1, &Output.debuggee_err/1)
     Launch.start_mix()
 
-    if Version.match?(System.version(), ">= 1.15.0-dev") do
+    if Version.match?(System.version(), ">= 1.15.0") do
       # make sue that debugger modules are in code path
       # without starting the app
       Mix.ensure_application!(:debugger)
diff --git a/apps/elixir_ls_debugger/test/debugger_test.exs b/apps/elixir_ls_debugger/test/debugger_test.exs
index 6e5ed1908..008c3057c 100644
--- a/apps/elixir_ls_debugger/test/debugger_test.exs
+++ b/apps/elixir_ls_debugger/test/debugger_test.exs
@@ -2331,7 +2331,7 @@ defmodule ElixirLS.Debugger.ServerTest do
       Server.receive_packet(server, request(6, "threads", %{}))
       assert_receive(response(_, 6, "threads", %{"threads" => threads}), 1_000)
 
-      if Version.match?(System.version(), ">= 1.15.0-dev") do
+      if Version.match?(System.version(), ">= 1.15.0") do
         assert Enum.find(threads, &(&1["id"] == thread_id))["name"] ==
                  "Task.Supervised.noreply/4 #{:erlang.pid_to_list(pid)}"
       else
diff --git a/apps/elixir_ls_debugger/test/test_helper.exs b/apps/elixir_ls_debugger/test/test_helper.exs
index 44c7073d9..fd8139a48 100644
--- a/apps/elixir_ls_debugger/test/test_helper.exs
+++ b/apps/elixir_ls_debugger/test/test_helper.exs
@@ -1,7 +1,7 @@
 Application.put_env(:elixir_ls_debugger, :test_mode, true)
 ExUnit.start(exclude: [pending: true])
 
-if Version.match?(System.version(), ">= 1.15.0-dev") do
+if Version.match?(System.version(), ">= 1.15.0") do
   # make sue that debugger modules are in code path
   # without starting the app
   Mix.ensure_application!(:debugger)
diff --git a/apps/elixir_ls_utils/lib/launch.ex b/apps/elixir_ls_utils/lib/launch.ex
index e2ce87f8e..9dff8154c 100644
--- a/apps/elixir_ls_utils/lib/launch.ex
+++ b/apps/elixir_ls_utils/lib/launch.ex
@@ -80,7 +80,7 @@ defmodule ElixirLS.Utils.Launch do
     file = ElixirLS.Utils.MixfileHelpers.mix_exs()
 
     if File.regular?(file) do
-      if Version.match?(System.version(), ">= 1.15.0-dev") do
+      if Version.match?(System.version(), ">= 1.15.0") do
         Mix.ProjectStack.post_config(state_loader: {:cli, List.first(args)})
       end
 
diff --git a/apps/language_server/lib/language_server/build.ex b/apps/language_server/lib/language_server/build.ex
index 3e29563b3..19412ce8f 100644
--- a/apps/language_server/lib/language_server/build.ex
+++ b/apps/language_server/lib/language_server/build.ex
@@ -113,9 +113,20 @@ defmodule ElixirLS.LanguageServer.Build do
 
       Mix.Task.clear()
 
-      if Version.match?(System.version(), ">= 1.15.0-dev") do
+      if Version.match?(System.version(), ">= 1.15.0") do
         if Logger.Backends.JsonRpc not in :logger.get_handler_ids() do
-          raise "build without intercepted logger #{inspect(:logger.get_handler_ids())}"
+          Logger.error("Build without intercepted logger #{inspect(:logger.get_handler_ids())}")
+
+          for handler_id <- :logger.get_handler_ids() do
+            :ok = :logger.remove_handler(handler_id)
+          end
+
+          :ok =
+            :logger.add_handler(
+              Logger.Backends.JsonRpc,
+              Logger.Backends.JsonRpc,
+              Logger.Backends.JsonRpc.handler_config()
+            )
         end
       end
 
@@ -168,28 +179,31 @@ defmodule ElixirLS.LanguageServer.Build do
         # store log config
         logger_config = Application.get_all_env(:logger)
 
-        logger_handler_configs =
-          if Version.match?(System.version(), ">= 1.15.0-dev") do
-            for handler_id <- :logger.get_handler_ids() do
-              {:ok, config} = :logger.get_handler_config(handler_id)
+        try do
+          Mix.Task.run("loadconfig")
+        after
+          # reset log config
+          Application.put_all_env(logger: logger_config)
+
+          if Version.match?(System.version(), ">= 1.15.0") do
+            # remove all log handlers and restore our
+            for handler_id <- :logger.get_handler_ids(), handler_id != Logger.Backends.JsonRpc do
               :ok = :logger.remove_handler(handler_id)
-              config
             end
-          end
-
-        Mix.Task.run("loadconfig")
 
-        # reset log config
-        Application.put_all_env(logger: logger_config)
-
-        if Version.match?(System.version(), ">= 1.15.0-dev") do
-          for config <- logger_handler_configs do
-            :ok = :logger.add_handler(config.id, config.module, config)
+            if Logger.Backends.JsonRpc not in :logger.get_handler_ids() do
+              :ok =
+                :logger.add_handler(
+                  Logger.Backends.JsonRpc,
+                  Logger.Backends.JsonRpc,
+                  Logger.Backends.JsonRpc.handler_config()
+                )
+            end
           end
-        end
 
-        # make sure ANSI is disabled
-        Application.put_env(:elixir, :ansi_enabled, false)
+          # make sure ANSI is disabled
+          Application.put_env(:elixir, :ansi_enabled, false)
+        end
       end
 
       {status, diagnostics}
@@ -212,7 +226,7 @@ defmodule ElixirLS.LanguageServer.Build do
     ]
 
     opts =
-      if Version.match?(System.version(), ">= 1.15.0-dev") do
+      if Version.match?(System.version(), ">= 1.15.0") do
         opts
       else
         opts ++ ["--all-warnings"]
diff --git a/apps/language_server/lib/language_server/cli.ex b/apps/language_server/lib/language_server/cli.ex
index d732d61dc..6df4bb7d0 100644
--- a/apps/language_server/lib/language_server/cli.ex
+++ b/apps/language_server/lib/language_server/cli.ex
@@ -10,7 +10,7 @@ defmodule ElixirLS.LanguageServer.CLI do
 
     # :logger application is already started
     # replace console logger with LSP
-    if Version.match?(System.version(), ">= 1.15.0-dev") do
+    if Version.match?(System.version(), ">= 1.15.0") do
       :ok = :logger.remove_handler(:default)
 
       :ok =
diff --git a/apps/language_server/lib/language_server/experimental/code_mod/format.ex b/apps/language_server/lib/language_server/experimental/code_mod/format.ex
index 7b5219862..115f8dba6 100644
--- a/apps/language_server/lib/language_server/experimental/code_mod/format.ex
+++ b/apps/language_server/lib/language_server/experimental/code_mod/format.ex
@@ -53,7 +53,7 @@ defmodule ElixirLS.LanguageServer.Experimental.CodeMod.Format do
       true = Code.ensure_loaded?(Mix.Tasks.Format)
 
       {formatter_function, options} =
-        if project_dir && Version.match?(System.version(), ">= 1.15.0-dev") do
+        if project_dir && Version.match?(System.version(), ">= 1.15.0") do
           Mix.Tasks.Format.formatter_for_file(path, root: project_dir)
         else
           Mix.Tasks.Format.formatter_for_file(path)
diff --git a/apps/language_server/lib/language_server/source_file.ex b/apps/language_server/lib/language_server/source_file.ex
index 9b7cac83a..7949ae50c 100644
--- a/apps/language_server/lib/language_server/source_file.ex
+++ b/apps/language_server/lib/language_server/source_file.ex
@@ -236,7 +236,7 @@ defmodule ElixirLS.LanguageServer.SourceFile do
     try do
       true = Code.ensure_loaded?(Mix.Tasks.Format)
 
-      if project_dir && Version.match?(System.version(), ">= 1.15.0-dev") do
+      if project_dir && Version.match?(System.version(), ">= 1.15.0") do
         {:ok, Mix.Tasks.Format.formatter_for_file(path, root: project_dir)}
       else
         {:ok, Mix.Tasks.Format.formatter_for_file(path)}
diff --git a/apps/language_server/test/server_test.exs b/apps/language_server/test/server_test.exs
index 44ac991d3..9f0b089b3 100644
--- a/apps/language_server/test/server_test.exs
+++ b/apps/language_server/test/server_test.exs
@@ -1038,7 +1038,7 @@ defmodule ElixirLS.LanguageServer.ServerTest do
 
       initialize(server)
 
-      if Version.match?(System.version(), ">= 1.15.0-dev") do
+      if Version.match?(System.version(), ">= 1.15.0") do
         assert_receive notification("textDocument/publishDiagnostics", %{
                          "uri" => ^error_file,
                          "diagnostics" => [
diff --git a/apps/language_server/test/support/server_test_helpers.ex b/apps/language_server/test/support/server_test_helpers.ex
index a03ae4fec..54a0a0c1e 100644
--- a/apps/language_server/test/support/server_test_helpers.ex
+++ b/apps/language_server/test/support/server_test_helpers.ex
@@ -26,7 +26,7 @@ defmodule ElixirLS.LanguageServer.Test.ServerTestHelpers do
   def replace_logger(packet_capture) do
     # :logger application is already started
     # replace console logger with LSP
-    if Version.match?(System.version(), ">= 1.15.0-dev") do
+    if Version.match?(System.version(), ">= 1.15.0") do
       configs =
         for handler_id <- :logger.get_handler_ids() do
           {:ok, config} = :logger.get_handler_config(handler_id)