diff --git a/wp-admin/includes/plugin-install.php b/wp-admin/includes/plugin-install.php
index f1451ddd6b..e1c1ec059d 100644
--- a/wp-admin/includes/plugin-install.php
+++ b/wp-admin/includes/plugin-install.php
@@ -41,7 +41,18 @@ function plugins_api($action, $args = null) {
 	$res = apply_filters('plugins_api', false, $action, $args);
 
 	if ( false === $res ) {
-		$request = wp_remote_post('http://api.wordpress.org/plugins/info/1.0/', array( 'timeout' => 15, 'body' => array('action' => $action, 'request' => serialize($args))) );
+		$url = 'http://api.wordpress.org/plugins/info/1.0/';
+		if ( wp_http_supports( array( 'ssl' ) ) )
+			$url = set_url_scheme( $url, 'https' );
+
+		$request = wp_remote_post( $url, array(
+			'timeout' => 15,
+			'body' => array(
+				'action' => $action,
+				'request' => serialize( $args )
+			)
+		) );
+
 		if ( is_wp_error($request) ) {
 			$res = new WP_Error('plugins_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), $request->get_error_message() );
 		} else {
diff --git a/wp-admin/includes/theme.php b/wp-admin/includes/theme.php
index 315f021386..0e48bac887 100644
--- a/wp-admin/includes/theme.php
+++ b/wp-admin/includes/theme.php
@@ -282,7 +282,17 @@ function themes_api($action, $args = null) {
 	$res = apply_filters('themes_api', false, $action, $args); //NOTE: Allows a theme to completely override the builtin WordPress.org API.
 
 	if ( ! $res ) {
-		$request = wp_remote_post('http://api.wordpress.org/themes/info/1.0/', array( 'body' => array('action' => $action, 'request' => serialize($args))) );
+		$url = 'http://api.wordpress.org/themes/info/1.0/';
+		if ( wp_http_supports( array( 'ssl' ) ) )
+			$url = set_url_scheme( $url, 'https' );
+
+		$request = wp_remote_post( $url, array(
+			'body' => array(
+				'action' => $action,
+				'request' => serialize( $args )
+			)
+		) );
+
 		if ( is_wp_error($request) ) {
 			$res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), $request->get_error_message() );
 		} else {
diff --git a/wp-includes/update.php b/wp-includes/update.php
index 203bf5447b..7c426a13e9 100644
--- a/wp-includes/update.php
+++ b/wp-includes/update.php
@@ -76,7 +76,6 @@ function wp_version_check() {
 	);
 
 	$url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );
-
 	if ( wp_http_supports( array( 'ssl' ) ) )
 		$url = set_url_scheme( $url, 'https' );
 
@@ -205,7 +204,11 @@ function wp_update_plugins() {
 		'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 	);
 
-	$raw_response = wp_remote_post('http://api.wordpress.org/plugins/update-check/1.0/', $options);
+	$url = 'http://api.wordpress.org/plugins/update-check/1.0/';
+	if ( wp_http_supports( array( 'ssl' ) ) )
+		$url = set_url_scheme( $url, 'https' );
+
+	$raw_response = wp_remote_post( $url, $options );
 
 	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
 		return false;
@@ -310,7 +313,11 @@ function wp_update_themes() {
 		'user-agent'	=> 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
 	);
 
-	$raw_response = wp_remote_post( 'http://api.wordpress.org/themes/update-check/1.0/', $options );
+	$url = 'http://api.wordpress.org/themes/update-check/1.0/';
+	if ( wp_http_supports( array( 'ssl' ) ) )
+		$url = set_url_scheme( $url, 'https' );
+
+	$raw_response = wp_remote_post( $url, $options );
 
 	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
 		return false;