diff --git a/README.md b/README.md
index f613519..731e808 100644
--- a/README.md
+++ b/README.md
@@ -214,7 +214,7 @@ and are more a heads-up for integrating librashader into your project.
 
 ## Versioning
 [![Latest Version](https://img.shields.io/crates/v/librashader.svg)](https://crates.io/crates/librashader)
-![C ABI](https://img.shields.io/badge/ABI%20version-1-yellowgreen)
+![C ABI](https://img.shields.io/badge/ABI%20version-2-yellowgreen)
 ![C API](https://img.shields.io/badge/API%20version-1-blue)
 
 
diff --git a/include/librashader.h b/include/librashader.h
index dde9a3c..8fb4d85 100644
--- a/include/librashader.h
+++ b/include/librashader.h
@@ -1040,7 +1040,12 @@ typedef libra_error_t (*PFN_libra_mtl_filter_chain_free)(libra_mtl_filter_chain_
 /// ## ABI Versions
 /// - ABI version 0: null instance (unloaded)
 /// - ABI version 1: 0.1.0
-/// - ABI version 2: 0.4.0
+/// - ABI version 2: 0.5.0
+///     - Reduced texture size information needed for some runtimes.
+///     - Removed wrapper structs for Direct3D 11 SRV and RTV handles.
+///     - Removed `gl_context_init`.
+///     - Make viewport handling consistent across runtimes, which are now
+///       span the output render target if omitted.
 #define LIBRASHADER_CURRENT_ABI 2
 
 #ifdef __cplusplus
diff --git a/librashader-capi/src/lib.rs b/librashader-capi/src/lib.rs
index d2bcfee..0442681 100644
--- a/librashader-capi/src/lib.rs
+++ b/librashader-capi/src/lib.rs
@@ -60,6 +60,9 @@
 //! to the same context as the drawing thread, and in Direct3D 11, where filter chain creation is unsafe
 //! if the `ID3D11Device` was created with `D3D11_CREATE_DEVICE_SINGLETHREADED`. Metal is entirely thread unsafe.
 //!
+//! Setting and retrieving filter parameters from any thread, regardless of the lack of other thread safety-guarantees
+//! of the runtime, is always thread safe.
+//!
 //! You must ensure that only thread has access to a created filter pass **before** you call `*_frame`. `*_frame` may only be
 //! called from one thread at a time.
 #![cfg_attr(feature = "docsrs", feature(doc_cfg))]
diff --git a/librashader-capi/src/version.rs b/librashader-capi/src/version.rs
index 072a5dc..c0fc41c 100644
--- a/librashader-capi/src/version.rs
+++ b/librashader-capi/src/version.rs
@@ -28,10 +28,16 @@ pub const LIBRASHADER_CURRENT_VERSION: LIBRASHADER_API_VERSION = 1;
 /// ABI versions are not backwards compatible. It is not
 /// valid to load a librashader C API instance for any ABI
 /// version not equal to LIBRASHADER_CURRENT_ABI.
+///
 /// ## ABI Versions
 /// - ABI version 0: null instance (unloaded)
 /// - ABI version 1: 0.1.0
-/// - ABI version 2: 0.4.0
+/// - ABI version 2: 0.5.0
+///     - Reduced texture size information needed for some runtimes.
+///     - Removed wrapper structs for Direct3D 11 SRV and RTV handles.
+///     - Removed `gl_context_init`.
+///     - Make viewport handling consistent across runtimes, which are now
+///       span the output render target if omitted.
 pub const LIBRASHADER_CURRENT_ABI: LIBRASHADER_ABI_VERSION = 2;
 
 /// Function pointer definition for libra_abi_version