# Items to be removed from future curl releases If any of these deprecated features is a cause for concern for you, please email the [curl-library mailing list](https://lists.haxx.se/listinfo/curl-library) as soon as possible and explain to us why this is a problem for you and how your use case cannot be satisfied properly using a workaround. ## c-ares 1.16.0 In March 2026, we drop support for all c-ares versions before 1.16.0. ## TLS-SRP Authentication Transport Layer Security Secure Remote Password is a TLS feature that does not work with TLS 1.3 or QUIC and is virtually unused by curl users and in general. TLS-SRP support gets removed in August 2026. ## SMB goes opt-in The SMB protocol has weak security and is rarely used these days. After curl 8.19.0 SMB support becomes opt-in. ## NTLM goes opt-in The NTLM authentication method has weak security and is rarely used these days. It has been deprecated by Microsoft and does not work over HTTP/2 or HTTP/3. After curl 8.19.0 NTLM support becomes opt-in. ## Past removals - axTLS (removed in 7.63.0) - Pipelining (removed in 7.65.0) - PolarSSL (removed in 7.69.0) - NPN (removed in 7.86.0) - Support for systems without 64-bit data types (removed in 8.0.0) - NSS (removed in 8.3.0) - gskit (removed in 8.3.0) - MinGW v1 (removed in 8.4.0) - NTLM_WB (removed in 8.8.0) - space-separated `NOPROXY` patterns (removed in 8.9.0) - hyper (removed in 8.12.0) - Support for Visual Studio 2005 and older (removed in 8.13.0) - Secure Transport (removed in 8.15.0) - BearSSL (removed in 8.15.0) - msh3 (removed in 8.16.0) - winbuild build system (removed in 8.17.0) - Windows CE (removed in 8.18.0) - Support for Visual Studio 2008 (removed in 8.18.0) - OpenSSL 1.1.1 and older (removed in 8.18.0) - Support for Windows XP (removed in 8.19.0) - OpenSSL-QUIC (removed in 8.19.0) - CMake 3.17 and older (removed in 8.20.0) - RTMP (removed in 8.20.0)