diff --git a/.changeset/puny-parts-unite.md b/.changeset/puny-parts-unite.md
new file mode 100644
index 000000000..2b6969dc2
--- /dev/null
+++ b/.changeset/puny-parts-unite.md
@@ -0,0 +1,7 @@
+---
+"fnm": patch
+---
+
+Fix networking in corporate root-CA environments on Mac OS
+
+This change enables os-native TLS handling in the `reqwest` crate, which allows fnm to make network requests in corporate environments that, for security reasons, proxy all traffic and have their own root certificate authority.
diff --git a/Cargo.lock b/Cargo.lock
index afe4f0e28..177a78654 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -710,6 +710,21 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
+[[package]]
+name = "foreign-types"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
+dependencies = [
+ "foreign-types-shared",
+]
+
+[[package]]
+name = "foreign-types-shared"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
+
 [[package]]
 name = "form_urlencoded"
 version = "1.2.1"
@@ -916,6 +931,22 @@ dependencies = [
  "webpki-roots",
 ]
 
+[[package]]
+name = "hyper-tls"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70206fc6890eaca9fde8a0bf71caa2ddfc9fe045ac9e5c70df101a7dbde866e0"
+dependencies = [
+ "bytes",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "native-tls",
+ "tokio",
+ "tokio-native-tls",
+ "tower-service",
+]
+
 [[package]]
 name = "hyper-util"
 version = "0.1.10"
@@ -1209,6 +1240,23 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "native-tls"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87de3442987e9dbec73158d5c715e7ad9072fda936bb03d19d7fa10e00520f0e"
+dependencies = [
+ "libc",
+ "log",
+ "openssl",
+ "openssl-probe",
+ "openssl-sys",
+ "schannel",
+ "security-framework",
+ "security-framework-sys",
+ "tempfile",
+]
+
 [[package]]
 name = "node-semver"
 version = "2.1.0"
@@ -1287,12 +1335,50 @@ version = "1.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
 
+[[package]]
+name = "openssl"
+version = "0.10.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f38c4372413cdaaf3cc79dd92d29d7d9f5ab09b51b10dded508fb90bb70b9222"
+dependencies = [
+ "bitflags",
+ "cfg-if",
+ "foreign-types",
+ "libc",
+ "once_cell",
+ "openssl-macros",
+ "openssl-sys",
+]
+
+[[package]]
+name = "openssl-macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "openssl-probe"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
+[[package]]
+name = "openssl-sys"
+version = "0.9.114"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13ce1245cd07fcc4cfdb438f7507b0c7e4f3849a69fd84d52374c66d83741bb6"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "os_pipe"
 version = "1.2.1"
@@ -1567,11 +1653,13 @@ dependencies = [
  "http-body-util",
  "hyper",
  "hyper-rustls",
+ "hyper-tls",
  "hyper-util",
  "ipnet",
  "js-sys",
  "log",
  "mime",
+ "native-tls",
  "once_cell",
  "percent-encoding",
  "pin-project-lite",
@@ -1585,6 +1673,7 @@ dependencies = [
  "serde_urlencoded",
  "sync_wrapper",
  "tokio",
+ "tokio-native-tls",
  "tokio-rustls",
  "tokio-util",
  "tower-service",
@@ -2094,6 +2183,16 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "tokio-native-tls"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbae76ab933c85776efabc971569dd6119c580d8f5d448769dec1764bf796ef2"
+dependencies = [
+ "native-tls",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-rustls"
 version = "0.26.0"
@@ -2286,6 +2385,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
 [[package]]
 name = "version_check"
 version = "0.9.5"
diff --git a/Cargo.toml b/Cargo.toml
index 6fd2ebd89..ca4379c40 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ indoc = "2.0.5"
 log = "0.4.21"
 env_logger = "0.11.3"
 encoding_rs_io = "0.1.7"
-reqwest = { version = "0.12.4", features = ["blocking", "json", "rustls-tls", "rustls-tls-native-roots", "brotli"], default-features = false }
+reqwest = { version = "0.12.4", features = ["blocking", "json", "rustls-tls", "rustls-tls-native-roots", "brotli", "native-tls"], default-features = false }
 url = "2.5.0"
 sysinfo = "0.30.12"
 thiserror = "1.0.61"