diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 28aa341..ba003bb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         rust: [
-          1.93.0, # MSRV
+          1.94.0, # MSRV
           stable,
           beta,
           nightly,
@@ -52,7 +52,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@1.93.0
+      - uses: dtolnay/rust-toolchain@1.94.0
         with:
           components: rustfmt
       - run: cargo fmt --all --check
diff --git a/Cargo.toml b/Cargo.toml
index 06e63bf..86df9df 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,13 +1,13 @@
 [package]
 name = "num-primitive"
-version = "0.3.6"
+version = "0.3.7"
 description = "Traits for primitive numeric types"
 repository = "https://github.com/rust-num/num-primitive"
 license = "MIT OR Apache-2.0"
 keywords = ["generic", "mathematics", "numerics", "primitive"]
 categories = ["algorithms", "science", "no-std"]
 edition = "2024"
-rust-version = "1.93"
+rust-version = "1.94"
 
 [package.metadata.release]
 allow-branch = ["main"]
diff --git a/RELEASES.md b/RELEASES.md
index 3ca1781..183a610 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,8 @@
+# Release 0.3.7 (2026-03-15)
+
+- Updated to MSRV 1.94.
+- Added `PrimitiveFloat::{EULER_GAMMA, GOLDEN_RATIO}`.
+
 # Release 0.3.6 (2026-01-26)
 
 - Link `const` documentation to the standard library.
diff --git a/src/float.rs b/src/float.rs
index 9035957..29da3a0 100644
--- a/src/float.rs
+++ b/src/float.rs
@@ -119,6 +119,9 @@ pub trait PrimitiveFloat:
     /// Euler's number (e)
     const E: Self;
 
+    /// The Euler-Mascheroni constant (γ)
+    const EULER_GAMMA: Self;
+
     /// 1/π
     const FRAC_1_PI: Self;
 
@@ -146,6 +149,9 @@ pub trait PrimitiveFloat:
     /// π/8
     const FRAC_PI_8: Self;
 
+    /// The golden ratio (φ)
+    const GOLDEN_RATIO: Self;
+
     /// ln(2)
     const LN_2: Self;
 
@@ -487,6 +493,7 @@ macro_rules! impl_float {
 
             use_consts!($consts::{
                 E: Self,
+                EULER_GAMMA: Self,
                 FRAC_1_PI: Self,
                 FRAC_1_SQRT_2: Self,
                 FRAC_2_PI: Self,
@@ -496,6 +503,7 @@ macro_rules! impl_float {
                 FRAC_PI_4: Self,
                 FRAC_PI_6: Self,
                 FRAC_PI_8: Self,
+                GOLDEN_RATIO: Self,
                 LN_2: Self,
                 LN_10: Self,
                 LOG2_10: Self,