diff --git a/build.zig b/build.zig
index 0f6b044..51b993b 100644
--- a/build.zig
+++ b/build.zig
@@ -1,5 +1,4 @@
 const std = @import("std");
-const builtin = @import("builtin");
 const Builder = @import("std").Build;
 
 const models_subdir = "codegen/sdk-codegen/aws-models/"; // note will probably not work on windows
diff --git a/codegen/src/Hasher.zig b/codegen/src/Hasher.zig
index cf8ca02..73d9812 100644
--- a/codegen/src/Hasher.zig
+++ b/codegen/src/Hasher.zig
@@ -20,7 +20,6 @@ const multihash_len = 1 + 1 + Hash.digest_length;
 pub const hex_multihash_len = 2 * multihash_len;
 pub const digest_len = Hash.digest_length;
 
-const MultiHashHexDigest = [hex_multihash_len]u8;
 const MultihashFunction = enum(u16) {
     identity = 0x00,
     sha1 = 0x11,
@@ -70,7 +69,7 @@ pub fn hex64(x: u64) [16]u8 {
     var result: [16]u8 = undefined;
     var i: usize = 0;
     while (i < 8) : (i += 1) {
-        const byte = @as(u8, @truncate(x >> @as(u6, @intCast(8 * i))));
+        const byte: u8 = @truncate(x >> @as(u6, @intCast(8 * i)));
         result[i * 2 + 0] = hex_charset[byte >> 4];
         result[i * 2 + 1] = hex_charset[byte & 15];
     }
diff --git a/lib/date/src/parsing.zig b/lib/date/src/parsing.zig
index adfac46..4713495 100644
--- a/lib/date/src/parsing.zig
+++ b/lib/date/src/parsing.zig
@@ -61,7 +61,6 @@ pub fn parseIso8601ToTimestamp(data: []const u8) !i64 {
     return try dateTimeToTimestamp(try parseIso8601ToDateTime(data));
 }
 
-const IsoParsingState = enum { Start, Year, Month, Day, Hour, Minute, Second, Millisecond, End };
 /// Converts a string to a timestamp value. May not handle dates before the
 /// epoch
 pub fn parseIso8601ToDateTime(data: []const u8) !DateTime {
diff --git a/lib/date/src/timestamp.zig b/lib/date/src/timestamp.zig
index 882c662..6f996a9 100644
--- a/lib/date/src/timestamp.zig
+++ b/lib/date/src/timestamp.zig
@@ -1,6 +1,5 @@
 const std = @import("std");
 const zeit = @import("zeit");
-const json = @import("json");
 
 pub const DateFormat = enum {
     rfc1123,
diff --git a/src/aws_http_base.zig b/src/aws_http_base.zig
index f624c3a..4a8f8e4 100644
--- a/src/aws_http_base.zig
+++ b/src/aws_http_base.zig
@@ -1,6 +1,5 @@
 //! This module provides base data structures for aws http requests
 const std = @import("std");
-const log = std.log.scoped(.aws_base);
 pub const Request = struct {
     path: []const u8 = "/",
     query: []const u8 = "",
diff --git a/src/case.zig b/src/case.zig
index be7a972..58ddc18 100644
--- a/src/case.zig
+++ b/src/case.zig
@@ -8,7 +8,7 @@ pub fn snakeToCamel(allocator: std.mem.Allocator, name: []const u8) ![]u8 {
     var rc = try allocator.alloc(u8, name.len);
     while (utf8_name.nextCodepoint()) |cp| {
         if (cp > 0xff) return error.UnicodeNotSupported;
-        const ascii_char = @as(u8, @truncate(cp));
+        const ascii_char: u8 = @truncate(cp);
         if (ascii_char != '_') {
             if (previous_ascii == '_' and ascii_char >= 'a' and ascii_char <= 'z') {
                 const uppercase_char = ascii_char - ('a' - 'A');