diff --git a/.appveyor.yml b/.appveyor.yml
index 01796a6..1ba8953 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -31,13 +31,17 @@ before_test:
   - C:\msys64\usr\bin\bash -c "if [ -d ""$USERPROFILE/.cargo/registry/cache"" ]; then cd ""$USERPROFILE/.cargo/registry""; /c/msys64/usr/bin/find cache -name \*.crate; fi"
 
 test_script:
-  - cargo +beta-%TARGET% clippy --all-targets --features "fail-on-warnings f16 serde"
-  - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings serde"
+  - cargo +beta-%TARGET% clippy --all-targets --features "fail-on-warnings az f16 serde"
+  - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings az f16"
+  - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings az serde"
+  - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings f16 serde"
+  - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings az"
   - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings f16"
+  - cargo +beta-%TARGET% check --all-targets --features "fail-on-warnings serde"
   - cargo +beta-%TARGET% check --all-targets --features fail-on-warnings
-  - cargo +beta-%TARGET% test --release --features "fail-on-warnings f16 serde"
+  - cargo +beta-%TARGET% test --release --features "fail-on-warnings az f16 serde"
   - cargo +beta-%TARGET% fmt -- --check
-  - cargo +1.34.2-%TARGET% test --lib --features "fail-on-warnings f16 serde"
+  - cargo +1.34.2-%TARGET% test --lib --features "fail-on-warnings az f16 serde"
 
 after_test:
   - C:\msys64\usr\bin\bash -c "if [ -d ""$USERPROFILE/.cargo/registry/cache"" ]; then cd ""$USERPROFILE/.cargo/registry""; /c/msys64/usr/bin/find cache -name \*.crate; fi"
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8a93835..059ba8f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,15 +28,19 @@ x86_64-gnulinux:
     paths:
     - cargo/
   script:
-  - cargo +beta-$TARGET clippy --all-targets --features "fail-on-warnings f16 serde"
-  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings serde"
+  - cargo +beta-$TARGET clippy --all-targets --features "fail-on-warnings az f16 serde"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings az f16"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings az serde"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings f16 serde"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings az"
   - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings f16"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings serde"
   - cargo +beta-$TARGET check --all-targets --features fail-on-warnings
-  - cargo +beta-$TARGET test --features "fail-on-warnings f16 serde"
-  - cargo +beta-$TARGET test --release --features "fail-on-warnings f16 serde"
+  - cargo +beta-$TARGET test --features "fail-on-warnings az f16 serde"
+  - cargo +beta-$TARGET test --release --features "fail-on-warnings az f16 serde"
   - cargo +beta-$TARGET fmt -- --check
-  - cargo +1.34.2-$TARGET test --lib --features "fail-on-warnings f16 serde"
-  - cargo +1.34.2-$TARGET test --release --lib --features "fail-on-warnings f16 serde"
+  - cargo +1.34.2-$TARGET test --lib --features "fail-on-warnings az f16 serde"
+  - cargo +1.34.2-$TARGET test --release --lib --features "fail-on-warnings az f16 serde"
 
 i686-gnulinux:
   image: i386/rust:1
@@ -47,12 +51,16 @@ i686-gnulinux:
     paths:
     - cargo/
   script:
-  - cargo +beta-$TARGET clippy --all-targets --features "fail-on-warnings f16 serde"
-  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings serde"
+  - cargo +beta-$TARGET clippy --all-targets --features "fail-on-warnings az f16 serde"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings az f16"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings az serde"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings f16 serde"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings az"
   - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings f16"
+  - cargo +beta-$TARGET check --all-targets --features "fail-on-warnings serde"
   - cargo +beta-$TARGET check --all-targets --features fail-on-warnings
   - cargo +beta-$TARGET test --features "fail-on-warnings f16 serde"
-  - cargo +beta-$TARGET test --release --features "fail-on-warnings f16 serde"
+  - cargo +beta-$TARGET test --release --features "fail-on-warnings azf16 serde"
   - cargo +beta-$TARGET fmt -- --check
-  - cargo +1.34.2-$TARGET test --lib --features "fail-on-warnings f16 serde"
-  - cargo +1.34.2-$TARGET test --release --lib --features "fail-on-warnings f16 serde"
+  - cargo +1.34.2-$TARGET test --lib --features "fail-on-warnings az f16 serde"
+  - cargo +1.34.2-$TARGET test --release --lib --features "fail-on-warnings az f16 serde"
diff --git a/README.md b/README.md
index 73c11ed..4d8280c 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,10 @@ The conversions supported cover the following cases.
 
 ## What’s new
 
+### Version 0.4.6 news (unreleased)
+
+  * Support for casts using the [*az* crate] was added.
+
 ### Version 0.4.5 news (2019-08-30)
 
   * Bug fix: display of many decimal numbers was panicking in debug
@@ -227,11 +231,13 @@ The *fixed* crate requires rustc version 1.34.0 or later.
 
 ## Optional features
 
-The *fixed* crate has two optional feature:
+The *fixed* crate has three optional feature:
 
- 1. `f16`, disabled by default. This provides conversion to/from
+ 1. `az`, disabled by default. This implements the cast traits
+    provided by the [*az* crate].
+ 2. `f16`, disabled by default. This provides conversion to/from
     [`f16`]. This features requires the [*half* crate].
- 2. `serde`, disabled by default. This provides serialization support
+ 3. `serde`, disabled by default. This provides serialization support
     for the fixed-point types. This feature requires the
     [*serde* crate].
 
@@ -262,6 +268,7 @@ License, Version 2.0, shall be dual licensed as above, without any
 additional terms or conditions.
 
 [*Cargo.toml*]: https://doc.rust-lang.org/cargo/guide/dependencies.html
+[*az* crate]: https://crates.io/crates/az
 [*fixed* crate]: https://crates.io/crates/fixed
 [*half* crate]: https://crates.io/crates/half
 [*serde* crate]: https://crates.io/crates/serde
diff --git a/RELEASES.md b/RELEASES.md
index 826562a..fa0e186 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -5,6 +5,11 @@ modification, are permitted in any medium without royalty provided the
 copyright notice and this notice are preserved. This file is offered
 as-is, without any warranty. -->
 
+Version 0.4.6 (unreleased)
+==========================
+
+  * Support for casts using the *az* crate was added.
+
 Version 0.4.5 (2019-08-30)
 ==========================
 
diff --git a/src/lib.rs b/src/lib.rs
index d9e3300..0cc86da 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -144,11 +144,13 @@ The *fixed* crate requires rustc version 1.34.0 or later.
 
 ## Optional features
 
-The *fixed* crate has two optional feature:
+The *fixed* crate has three optional feature:
 
- 1. `f16`, disabled by default. This provides conversion to/from
+ 1. `az`, disabled by default. This implements the cast traits
+    provided by the [*az* crate].
+ 2. `f16`, disabled by default. This provides conversion to/from
     [`f16`]. This features requires the [*half* crate].
- 2. `serde`, disabled by default. This provides serialization support
+ 3. `serde`, disabled by default. This provides serialization support
     for the fixed-point types. This feature requires the
     [*serde* crate].
 
@@ -179,6 +181,7 @@ License, Version 2.0, shall be dual licensed as above, without any
 additional terms or conditions.
 
 [*Cargo.toml*]: https://doc.rust-lang.org/cargo/guide/dependencies.html
+[*az* crate]: https://crates.io/crates/az
 [*fixed* crate]: https://crates.io/crates/fixed
 [*half* crate]: https://crates.io/crates/half
 [*serde* crate]: https://crates.io/crates/serde