diff --git a/Changes b/Changes
index 3c707a80a..dfbe28bdb 100644
--- a/Changes
+++ b/Changes
@@ -2063,3 +2063,5 @@
 - Fix a few compiler warnings with some double-casting and another
   const. (#3939)
 - Define intptr_t in win32's setup.h. (#3939)
+- Upgraded c-ares to 1.7.3. API seems compatible with
+  c-ares-1.6.3. (#3932)
diff --git a/configure b/configure
index e90df2b58..980974277 100755
--- a/configure
+++ b/configure
@@ -6786,7 +6786,7 @@ fi
 
 if test "x$with_system_cares" = "xno"; then :
 
-cares_version="1.6.0"
+cares_version="1.7.3"
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: extracting c-ares resolver library" >&5
 $as_echo "extracting c-ares resolver library" >&6; }
 cur_dir=`pwd`
diff --git a/configure.ac b/configure.ac
index 176a0a4f0..590a9f006 100644
--- a/configure.ac
+++ b/configure.ac
@@ -578,7 +578,7 @@ AS_IF([test "x$with_system_cares" = "xno"],[
 dnl REMEMBER TO CHANGE WITH A NEW C-ARES RELEASE!
 dnl NOTE: when changing this here, ALSO change it in ./curlinstall
 dnl       and in the comment in this file around line 400!
-cares_version="1.6.0"
+cares_version="1.7.3"
 AC_MSG_RESULT(extracting c-ares resolver library)
 cur_dir=`pwd`
 cd extras
diff --git a/extras/c-ares.tar.gz b/extras/c-ares.tar.gz
index 30623d62d..011b6040a 100644
Binary files a/extras/c-ares.tar.gz and b/extras/c-ares.tar.gz differ