diff --git a/Library/Homebrew/os/mac/pkgconfig/10.13/libcurl.pc b/Library/Homebrew/os/mac/pkgconfig/10.13/libcurl.pc
index 91c69df6e5..ff7a29ee24 100644
--- a/Library/Homebrew/os/mac/pkgconfig/10.13/libcurl.pc
+++ b/Library/Homebrew/os/mac/pkgconfig/10.13/libcurl.pc
@@ -28,12 +28,12 @@ exec_prefix=${prefix}
 libdir=${exec_prefix}/lib
 includedir=${prefix}/include
 supported_protocols="DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS LDAP LDAPS POP3 POP3S RTSP SMB SMBS SMTP SMTPS TELNET TFTP"
-supported_features="AsynchDNS IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz UnixSockets"
+supported_features="AsynchDNS IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz HTTP2 UnixSockets HTTPS-proxy"
 
 Name: libcurl
 URL: https://curl.haxx.se/
 Description: Library to transfer files with ftp, http, etc.
-Version: 7.51.0
+Version: 7.54.0
 Libs: -L${libdir} -lcurl
 Libs.private: -lldap -lz
 Cflags: -I${includedir}
diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
index d957792afa..1d70c39812 100644
--- a/Library/Homebrew/os/mac/xcode.rb
+++ b/Library/Homebrew/os/mac/xcode.rb
@@ -216,7 +216,7 @@ module OS
         # on the older supported platform for that Xcode release, i.e there's no
         # CLT package for 10.11 that contains the Clang version from Xcode 8.
         case MacOS.version
-        when "10.13" then "900.0.22.8"
+        when "10.13" then "900.0.26"
         when "10.12" then "802.0.42"
         when "10.11" then "800.0.42.1"
         when "10.10" then "700.1.81"
@@ -229,6 +229,7 @@ module OS
 
       def minimum_version
         case MacOS.version
+        when "10.13" then "9.0.0"
         when "10.12" then "8.0.0"
         else "1.0.0"
         end