diff --git a/config/software/libxml2.rb b/config/software/libxml2.rb
index df04ca735..9222599fe 100644
--- a/config/software/libxml2.rb
+++ b/config/software/libxml2.rb
@@ -15,7 +15,7 @@
 #
 
 name "libxml2"
-default_version "2.9.14"
+default_version "2.10.4"
 
 license "MIT"
 license_file "COPYING"
@@ -26,6 +26,7 @@
 dependency "config_guess"
 
 # version_list: url=https://download.gnome.org/sources/libxml2/2.9/ filter=*.tar.xz
+version("2.10.4") { source sha256: "ed0c91c5845008f1936739e4eee2035531c1c94742c6541f44ee66d885948d45" }
 version("2.9.14") { source sha256: "60d74a257d1ccec0475e749cba2f21559e48139efba6ff28224357c7c798dfee" }
 version("2.9.13") { source sha256: "276130602d12fe484ecc03447ee5e759d0465558fbc9d6bd144e3745306ebf0e" }
 version("2.9.12") { source sha256: "28a92f6ab1f311acf5e478564c49088ef0ac77090d9c719bbc5d518f1fe62eb9" }
@@ -56,6 +57,11 @@
     "--without-docbook",
   ]
 
+  # if windows?
+  #   configure_command << "--disable-shared"
+  #   env["CFLAGS"] << " -DIN_LIBXML"
+  #   env["CPPFLAGS"] = "-DLIBXML_STATIC"
+  # end
   update_config_guess
 
   configure(*configure_command, env: env)
diff --git a/config/software/libxslt.rb b/config/software/libxslt.rb
index 9ab49c5ac..597cdd2ec 100644
--- a/config/software/libxslt.rb
+++ b/config/software/libxslt.rb
@@ -15,7 +15,7 @@
 #
 
 name "libxslt"
-default_version "1.1.35"
+default_version "1.1.39"
 
 license "MIT"
 license_file "COPYING"
@@ -26,6 +26,7 @@
 dependency "config_guess"
 
 # versions_list: url=https://download.gnome.org/sources/libxslt/1.1/ filter=*.tar.xz
+version("1.1.39") { source sha256: "2a20ad621148339b0759c4d4e96719362dee64c9a096dbba625ba053846349f0" }
 version("1.1.37") { source sha256: "3a4b27dc8027ccd6146725950336f1ec520928f320f144eb5fa7990ae6123ab4" }
 version("1.1.36") { source sha256: "12848f0a4408f65b530d3962cd9ff670b6ae796191cfeff37522b5772de8dc8e" }
 version("1.1.35") { source sha256: "8247f33e9a872c6ac859aa45018bc4c4d00b97e2feac9eebc10c93ce1f34dd79" }
@@ -54,7 +55,9 @@
   # iteration treats colons as a delimiter so we are using a cygwin
   # style path to accomodate
   configure_commands = [
-    "--with-libxml-prefix=#{install_dir.sub("C:", "/C")}/embedded",
+    "--with-libxml-prefix=#{install_dir.sub("C:", "/C")}/embedded/",
+    "--with-xml2-lib=#{install_dir.sub("C:", "/C")}/embedded/lib",
+    "--with-xml2-include=#{install_dir.sub("C:", "/C")}/embedded/include/libxml2",
     "--without-python",
     "--without-crypto",
     "--without-profiler",
@@ -62,7 +65,7 @@
   ]
 
   configure(*configure_commands, env: env)
-
+  make "clean", env: env
   make "-j #{workers}", env: env
   make "install", env: env
 end