diff --git a/Cargo.lock b/Cargo.lock
index a76a60c..9901d17 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -277,15 +277,6 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
-[[package]]
-name = "proc-macro-crate"
-version = "3.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d37c51ca738a55da99dc0c4a34860fd675453b8b36209178c2249bb13651284"
-dependencies = [
- "toml_edit",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.86"
@@ -341,9 +332,9 @@ checksum = "ba39f3699c378cd8970968dcbff9c43159ea4cfbd88d43c00b22f2ef10a435d2"
 
 [[package]]
 name = "rstest"
-version = "0.21.0"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9afd55a67069d6e434a95161415f5beeada95a01c7b815508a82dcb0e1593682"
+checksum = "97eeab2f3c0a199bc4be135c36c924b6590b88c377d416494288c14f2db30199"
 dependencies = [
  "futures",
  "futures-timer",
@@ -353,13 +344,12 @@ dependencies = [
 
 [[package]]
 name = "rstest_macros"
-version = "0.21.0"
+version = "0.18.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4165dfae59a39dd41d8dec720d3cbfbc71f69744efb480a3920f5d4e0cc6798d"
+checksum = "d428f8247852f894ee1be110b375111b586d4fa431f6c46e64ba5a0dcccbe605"
 dependencies = [
  "cfg-if",
  "glob",
- "proc-macro-crate",
  "proc-macro2",
  "quote",
  "regex",
@@ -489,23 +479,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "toml_datetime"
-version = "0.6.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4badfd56924ae69bcc9039335b2e017639ce3f9b001c393c1b2d1ef846ce2cbf"
-
-[[package]]
-name = "toml_edit"
-version = "0.21.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a8534fd7f78b5405e860340ad6575217ce99f38d4d5c8f2442cb5ecb50090e1"
-dependencies = [
- "indexmap",
- "toml_datetime",
- "winnow",
-]
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
@@ -596,12 +569,3 @@ name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
-
-[[package]]
-name = "winnow"
-version = "0.5.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f593a95398737aeed53e489c785df13f3618e41dbcd6718c6addbf1395aa6876"
-dependencies = [
- "memchr",
-]
diff --git a/slinky/Cargo.toml b/slinky/Cargo.toml
index 64edc4a..3118b5d 100644
--- a/slinky/Cargo.toml
+++ b/slinky/Cargo.toml
@@ -5,7 +5,7 @@
 name = "slinky"
 version = "0.2.2"
 edition = "2021"
-rust-version = "1.67.1"
+rust-version = "1.66.1"
 authors = ["Anghelo Carvajal <angheloalf95@gmail.com>"]
 license = "MIT"
 description = "Linker script generator for decompilation and modding projects"
@@ -21,4 +21,4 @@ thiserror = "1.0.57"
 indexmap = "2.2.6"
 
 [dev-dependencies]
-rstest = "0.21.0"
+rstest = "0.18.2"