diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8fd052..1b84b15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -45,6 +45,10 @@
 - Unknown biome types (from not yet supported or modded versions of Minecraft)
   will now use plains biome colors as a fallback instead of resulting in water,
   grass and foliage blocks to be rendered as transparent pixels
+- Switched from zlib-ng to zlib-rs
+
+  This should have no noticable effect on the usage of MinedMap, but avoids
+  an external build dependency on CMake.
 
 ## [2.4.0] - 2025-01-11
 
diff --git a/Cargo.lock b/Cargo.lock
index 039e940..7bd83ee 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -84,9 +84,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.95"
+version = "1.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34ac096ce696dc2fcabef30516bb13c0a68a11d30131d3df6f04711467681b04"
+checksum = "6b964d184e89d9b6b67dd2715bc8e74cf3107fb2b529990c90cf517326150bf4"
 
 [[package]]
 name = "autocfg"
@@ -150,9 +150,9 @@ checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
 
 [[package]]
 name = "cc"
-version = "1.2.13"
+version = "1.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7777341816418c02e033934a09f20dc0ccaf65a5201ef8a450ae0105a573fda"
+checksum = "be714c154be609ec7f5dad223a33bf1482fff90472de28f7362806e6d4832b8c"
 dependencies = [
  "jobserver",
  "libc",
@@ -173,9 +173,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "4.5.29"
+version = "4.5.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8acebd8ad879283633b343856142139f2da2317c96b05b4dd6181c61e2480184"
+checksum = "027bb0d98429ae334a8698531da7077bdf906419543a35a55c2cb1b66437d767"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -183,9 +183,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.29"
+version = "4.5.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6ba32cbda51c7e1dfd49acc1457ba1a7dec5b64fe360e828acb13ca8dc9c2f9"
+checksum = "5589e0cba072e0f3d23791efac0fd8627b49c829c196a492e88168e6a669d863"
 dependencies = [
  "anstream",
  "anstyle",
@@ -212,15 +212,6 @@ version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
 
-[[package]]
-name = "cmake"
-version = "0.1.54"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7caa3f9de89ddbe2c607f4101924c5abec803763ae9534e4f4d7d8f84aa81f0"
-dependencies = [
- "cc",
-]
-
 [[package]]
 name = "colorchoice"
 version = "1.0.3"
@@ -263,9 +254,9 @@ checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
 [[package]]
 name = "either"
-version = "1.13.0"
+version = "1.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
+checksum = "b7914353092ddf589ad78f25c5c1c21b7f80b0ff8621e7c814c3485b5306da9d"
 
 [[package]]
 name = "enum-map"
@@ -310,9 +301,9 @@ dependencies = [
 
 [[package]]
 name = "equivalent"
-version = "1.0.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
 [[package]]
 name = "errno"
@@ -359,12 +350,12 @@ dependencies = [
 
 [[package]]
 name = "flate2"
-version = "1.0.35"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c936bfdafb507ebbf50b8074c54fa31c5be9a1e7e5f467dd659697041407d07c"
+checksum = "11faaf5a5236997af9848be0bef4db95824b1d534ebc64d0f0c6cf3e67bd38dc"
 dependencies = [
  "crc32fast",
- "libz-ng-sys",
+ "libz-rs-sys",
  "miniz_oxide",
 ]
 
@@ -448,9 +439,9 @@ dependencies = [
 
 [[package]]
 name = "glam"
-version = "0.29.2"
+version = "0.30.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc46dd3ec48fdd8e693a98d2b8bafae273a2d54c1de02a2a7e3d57d501f39677"
+checksum = "17fcdf9683c406c2fc4d124afd29c0d595e22210d633cbdb8695ba9935ab1dc6"
 
 [[package]]
 name = "hashbrown"
@@ -593,9 +584,9 @@ checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 
 [[package]]
 name = "libc"
-version = "0.2.169"
+version = "0.2.170"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
+checksum = "875b3680cb2f8f71bdcf9a30f38d48282f5d3c95cbf9b3fa57269bb5d5c06828"
 
 [[package]]
 name = "libredox"
@@ -609,13 +600,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "libz-ng-sys"
-version = "1.1.21"
+name = "libz-rs-sys"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cee1488e961a80d172564fd6fcda11d8a4ac6672c06fe008e9213fa60520c2b"
+checksum = "902bc563b5d65ad9bba616b490842ef0651066a1a1dc3ce1087113ffcb873c8d"
 dependencies = [
- "cmake",
- "libc",
+ "zlib-rs",
 ]
 
 [[package]]
@@ -636,9 +626,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.25"
+version = "0.4.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04cbf5b083de1c7e0222a7a51dbfdba1cbe1c6ab0b15e29fff3f6c077fd9cd9f"
+checksum = "30bde2b3dc3671ae49d8e2e9f044c7c005836e7a023ee57cffa25ab82764bb9e"
 
 [[package]]
 name = "lru"
@@ -664,6 +654,7 @@ dependencies = [
  "clap",
  "enum-map",
  "fastnbt",
+ "flate2",
  "futures-util",
  "git-version",
  "humantime",
@@ -728,9 +719,9 @@ dependencies = [
 
 [[package]]
 name = "miniz_oxide"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3b1c9bd4fe1f0f8b387f6eb9eb3b4a1aa26185e5750efb9140301703f62cd1b"
+checksum = "8e3e04debbb59698c15bacbb6d93584a8c0ca9cc3213cb423d31f760d8843ce5"
 dependencies = [
  "adler2",
  "simd-adler32",
@@ -989,9 +980,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.8"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03a862b389f93e68874fbf580b9de08dd02facb9a788ebadaf4a3fd33cf58834"
+checksum = "82b568323e98e49e2a0899dcee453dd679fae22d69adf9b11dd508d1549b7e2f"
 dependencies = [
  "bitflags 2.8.0",
 ]
@@ -1073,9 +1064,9 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "serde"
-version = "1.0.217"
+version = "1.0.218"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02fc4265df13d6fa1d00ecff087228cc0a2b5f3c0e87e258d8b94a156e984c70"
+checksum = "e8dfc9d19bdbf6d17e22319da49161d5d0108e4188e8b680aef6299eed22df60"
 dependencies = [
  "serde_derive",
 ]
@@ -1091,9 +1082,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.217"
+version = "1.0.218"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a9bf7cf98d04a2b28aead066b7496853d4779c9cc183c440dbac457641e19a0"
+checksum = "f09503e191f4e797cb8aac08e9a4a4695c5edf6a2e70e376d961ddd5c969f82b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1102,9 +1093,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.138"
+version = "1.0.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d434192e7da787e94a6ea7e9670b26a036d0ca41e0b7efb2676dd32bae872949"
+checksum = "44f86c3acccc9c65b153fe1b85a3be07fe5515274ec9f0653b4a0875731c72a6"
 dependencies = [
  "itoa",
  "memchr",
@@ -1150,9 +1141,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.13.2"
+version = "1.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
+checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
 
 [[package]]
 name = "strsim"
@@ -1281,9 +1272,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.16"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a210d160f08b701c8721ba1c726c11662f877ea6b7094007e1ca9a1041945034"
+checksum = "00e2473a93778eb0bad35909dff6a10d28e63f792f16ed15e404fca9d5eeedbe"
 
 [[package]]
 name = "utf8parse"
@@ -1427,28 +1418,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
-name = "zstd"
-version = "0.13.2"
+name = "zlib-rs"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcf2b778a664581e31e389454a7072dab1647606d44f7feea22cd5abb9c9f3f9"
+checksum = "8b20717f0917c908dc63de2e44e97f1e6b126ca58d0e391cee86d504eb8fbd05"
+
+[[package]]
+name = "zstd"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91ee311a569c327171651566e07972200e76fcfe2242a4fa446149a3881c08a"
 dependencies = [
  "zstd-safe",
 ]
 
 [[package]]
 name = "zstd-safe"
-version = "7.2.1"
+version = "7.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54a3ab4db68cea366acc5c897c7b4d4d1b8994a9cd6e6f841f8964566a419059"
+checksum = "f3051792fbdc2e1e143244dc28c60f73d8470e93f3f9cbd0ead44da5ed802722"
 dependencies = [
  "zstd-sys",
 ]
 
 [[package]]
 name = "zstd-sys"
-version = "2.0.13+zstd.1.5.6"
+version = "2.0.14+zstd.1.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38ff0f21cfee8f97d94cef41359e0c89aa6113028ab0291aa8ca0038995a95aa"
+checksum = "8fb060d4926e4ac3a3ad15d864e99ceb5f343c6b34f5bd6d81ae6ed417311be5"
 dependencies = [
  "cc",
  "pkg-config",
diff --git a/Cargo.toml b/Cargo.toml
index d213a56..812ad33 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,6 +42,7 @@ bincode = "1.3.3"
 clap = { version = "4.1.4", features = ["derive", "wrap_help"] }
 enum-map = "2.7.3"
 fastnbt = "2.3.2"
+flate2 = { version = "1.1.0", features = ["zlib-rs"] }
 futures-util = "0.3.28"
 git-version = "0.3.5"
 humantime = "2.1.0"
@@ -67,7 +68,6 @@ tracing-subscriber = "0.3.17"
 zstd = "0.13.0"
 
 [features]
-default = ["jemalloc-auto", "zlib-ng"]
+default = ["jemalloc-auto"]
 jemalloc-auto = ["dep:minedmap-default-alloc"]
 jemalloc = ["jemalloc-auto", "minedmap-default-alloc/jemalloc"]
-zlib-ng = ["minedmap-nbt/zlib-ng"]
diff --git a/Dockerfile b/Dockerfile
index 389fb08..818971d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM docker.io/library/alpine:latest AS builder
 
 WORKDIR /build
-RUN apk add --no-cache build-base cmake cargo
+RUN apk add --no-cache build-base cargo
 
 ARG MINEDMAP_VERSION
 
diff --git a/README.md b/README.md
index 7d60f78..952163f 100644
--- a/README.md
+++ b/README.md
@@ -117,11 +117,6 @@ or newer). The following command can be used to build the current development ve
 cargo install --git 'https://github.com/neocturne/MinedMap.git'
 ```
 
-In addition, CMake is needed to build the zlib-ng library. If you do not have
-CMake installed, you can disable the zlib-ng feature by passing `--no-default-features`
-to cargo. A pure-Rust zlib implementation will be used, which is more portable,
-but slower than zlib-ng.
-
 If you are looking for the older C++ implementation of the MinedMap tile renderer,
 see the [v1.19.1](https://github.com/neocturne/MinedMap/tree/v1.19.1) tag.
 
diff --git a/crates/nbt/Cargo.toml b/crates/nbt/Cargo.toml
index 9f815da..01bbd78 100644
--- a/crates/nbt/Cargo.toml
+++ b/crates/nbt/Cargo.toml
@@ -11,12 +11,10 @@ repository.workspace = true
 anyhow = "1.0.75"
 bytemuck = "1.13.1"
 fastnbt = "2.4.4"
-flate2 = "1.0.27"
+flate2 = "1.1.0"
 minedmap-types = { version = "0.1.4", path = "../types" }
 serde = "1.0.183"
 
-[features]
-zlib-ng = ["flate2/zlib-ng"]
-
 [dev-dependencies]
 clap = { version = "4.3.23", features = ["derive"] }
+flate2 = { version = "1.1.0", features = ["zlib-rs"] }
diff --git a/crates/resource/Cargo.toml b/crates/resource/Cargo.toml
index 4e0d512..07b6d1f 100644
--- a/crates/resource/Cargo.toml
+++ b/crates/resource/Cargo.toml
@@ -9,5 +9,5 @@ repository.workspace = true
 
 [dependencies]
 enumflags2 = { version = "0.7.7", features = ["serde"] }
-glam = "0.29.2"
+glam = "0.30.0"
 serde = { version = "1.0.183", features = ["derive"] }