diff --git a/build.zig b/build.zig
index 15a7a47..c9be825 100644
--- a/build.zig
+++ b/build.zig
@@ -64,7 +64,7 @@ pub fn config(step: *std.build.Step) anyerror!void {
     var file = try dir.createFile("zls.json", .{});
     defer file.close();
 
-    const out = file.outStream();
+    const out = file.writer();
 
     std.debug.warn("Writing to config...\n", .{});
 
diff --git a/src/analysis.zig b/src/analysis.zig
index 8e98c37..6370553 100644
--- a/src/analysis.zig
+++ b/src/analysis.zig
@@ -64,9 +64,9 @@ pub fn collectDocComments(
 pub fn getFunctionSignature(tree: *ast.Tree, func: *ast.Node.FnProto) []const u8 {
     const start = tree.token_locs[func.firstToken()].start;
     const end = tree.token_locs[switch (func.return_type) {
-        .Explicit, .InferErrorSet => |node| node.lastToken(),
-        .Invalid => |r_paren| r_paren,
-    }].end;
+            .Explicit, .InferErrorSet => |node| node.lastToken(),
+            .Invalid => |r_paren| r_paren,
+        }].end;
     return tree.source[start..end];
 }
 
@@ -80,7 +80,7 @@ pub fn getFunctionSnippet(allocator: *std.mem.Allocator, tree: *ast.Tree, func:
     try buffer.appendSlice(tree.tokenSlice(name_tok));
     try buffer.append('(');
 
-    var buf_stream = buffer.outStream();
+    var buf_stream = buffer.writer();
 
     for (func.paramsConst()) |param, param_num| {
         if (skip_self_param and param_num == 0) continue;
@@ -2006,7 +2006,7 @@ pub const DocumentScope = struct {
             while (decl_it.next()) |name_decl| : (idx += 1) {
                 if (idx != 0) log.debug(", ", .{});
             }
-                log.debug("{s}", .{name_decl.key});
+            log.debug("{s}", .{name_decl.key});
             log.debug("\n--------------------------\n", .{});
         }
     }
diff --git a/src/main.zig b/src/main.zig
index 85e1b47..83dcd0c 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -88,7 +88,7 @@ pub fn log(
 }
 
 // Code is largely based off of https://github.com/andersfr/zig-lsp/blob/master/server.zig
-var stdout: std.io.BufferedOutStream(4096, std.fs.File.OutStream) = undefined;
+var stdout: std.io.BufferedWriter(4096, std.fs.File.Writer) = undefined;
 var allocator: *std.mem.Allocator = undefined;
 
 var document_store: DocumentStore = undefined;
@@ -155,7 +155,7 @@ fn respondGeneric(id: types.RequestId, response: []const u8) !void {
     // Numbers of character that will be printed from this string: len - 1 brackets
     const json_fmt = "{{\"jsonrpc\":\"2.0\",\"id\":";
 
-    const stdout_stream = stdout.outStream();
+    const stdout_stream = stdout.writer();
     try stdout_stream.print("Content-Length: {}\r\n\r\n" ++ json_fmt, .{response.len + id_len + json_fmt.len - 1});
     switch (id) {
         .Integer => |int| try stdout_stream.print("{}", .{int}),
@@ -203,7 +203,7 @@ fn publishDiagnostics(arena: *std.heap.ArenaAllocator, handle: DocumentStore.Han
 
         var mem_buffer: [256]u8 = undefined;
         var fbs = std.io.fixedBufferStream(&mem_buffer);
-        try tree.renderError(err, fbs.outStream());
+        try tree.renderError(err, fbs.writer());
 
         try diagnostics.append(.{
             .range = astLocationToRange(loc),
@@ -1536,7 +1536,7 @@ pub fn main() anyerror!void {
 
     // Init global vars
     const reader = std.io.getStdIn().reader();
-    stdout = std.io.bufferedOutStream(std.io.getStdOut().outStream());
+    stdout = std.io.bufferedWriter(std.io.getStdOut().writer());
 
     // Read the configuration, if any.
     const config_parse_options = std.json.ParseOptions{ .allocator = allocator };
diff --git a/src/uri.zig b/src/uri.zig
index 59ea9d6..1e7c89a 100644
--- a/src/uri.zig
+++ b/src/uri.zig
@@ -14,7 +14,7 @@ pub fn fromPath(allocator: *std.mem.Allocator, path: []const u8) ![]const u8 {
     var buf = std.ArrayList(u8).init(allocator);
     try buf.appendSlice(prefix);
 
-    const out_stream = buf.outStream();
+    const out_stream = buf.writer();
 
     for (path) |char| {
         if (char == std.fs.path.sep) {
@@ -41,7 +41,7 @@ pub fn fromPath(allocator: *std.mem.Allocator, path: []const u8) ![]const u8 {
     return buf.toOwnedSlice();
 }
 
-pub const UriParseError = error {
+pub const UriParseError = error{
     UriBadScheme,
     UriBadHexChar,
     UriBadEscape,