diff --git a/wp-admin/includes/update.php b/wp-admin/includes/update.php
index 171aa84c52..43db04b523 100644
--- a/wp-admin/includes/update.php
+++ b/wp-admin/includes/update.php
@@ -262,28 +262,26 @@ function update_nag() {
 		return false;
 	}
 
+	$version_url = sprintf(
+		/* translators: %s: WordPress version */
+		esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+		sanitize_title( $cur->current )
+	);
+
 	if ( current_user_can( 'update_core' ) ) {
 		$msg = sprintf(
-			/* translators: 1: Codex URL to release notes, 2: new WordPress version, 3: URL to network admin, 4: accessibility text */
+			/* translators: 1: URL to WordPress release notes, 2: new WordPress version, 3: URL to network admin, 4: accessibility text */
 			__( '<a href="%1$s">WordPress %2$s</a> is available! <a href="%3$s" aria-label="%4$s">Please update now</a>.' ),
-			sprintf(
-				/* translators: %s: WordPress version */
-				esc_url( __( 'https://codex.wordpress.org/Version_%s' ) ),
-				$cur->current
-			),
+			$version_url,
 			$cur->current,
 			network_admin_url( 'update-core.php' ),
 			esc_attr__( 'Please update WordPress now' )
 		);
 	} else {
 		$msg = sprintf(
-			/* translators: 1: Codex URL to release notes, 2: new WordPress version */
+			/* translators: 1: URL to WordPress release notes, 2: new WordPress version */
 			__( '<a href="%1$s">WordPress %2$s</a> is available! Please notify the site administrator.' ),
-			sprintf(
-				/* translators: %s: WordPress version */
-				esc_url( __( 'https://codex.wordpress.org/Version_%s' ) ),
-				$cur->current
-			),
+			$version_url,
 			$cur->current
 		);
 	}
diff --git a/wp-admin/install.php b/wp-admin/install.php
index ce5849204f..8393b9260d 100644
--- a/wp-admin/install.php
+++ b/wp-admin/install.php
@@ -238,15 +238,21 @@ $mysql_version = $wpdb->db_version();
 $php_compat    = version_compare( $php_version, $required_php_version, '>=' );
 $mysql_compat  = version_compare( $mysql_version, $required_mysql_version, '>=' ) || file_exists( WP_CONTENT_DIR . '/db.php' );
 
+$version_url = sprintf(
+	/* translators: %s: WordPress version */
+	esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+	sanitize_title( $wp_version )
+);
+
 if ( ! $mysql_compat && ! $php_compat ) {
-	/* translators: 1: WordPress version number, 2: Minimum required PHP version number, 3: Minimum required MySQL version number, 4: Current PHP version number, 5: Current MySQL version number */
-	$compat = sprintf( __( 'You cannot install because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.' ), $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version );
+	/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Minimum required MySQL version number, 5: Current PHP version number, 6: Current MySQL version number */
+	$compat = sprintf( __( 'You cannot install because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher and MySQL version %4$s or higher. You are running PHP version %5$s and MySQL version %6$s.' ), $version_url, $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version );
 } elseif ( ! $php_compat ) {
-	/* translators: 1: WordPress version number, 2: Minimum required PHP version number, 3: Current PHP version number */
-	$compat = sprintf( __( 'You cannot install because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher. You are running version %3$s.' ), $wp_version, $required_php_version, $php_version );
+	/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Current PHP version number */
+	$compat = sprintf( __( 'You cannot install because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher. You are running version %4$s.' ), $version_url, $wp_version, $required_php_version, $php_version );
 } elseif ( ! $mysql_compat ) {
-	/* translators: 1: WordPress version number, 2: Minimum required MySQL version number, 3: Current MySQL version number */
-	$compat = sprintf( __( 'You cannot install because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires MySQL version %2$s or higher. You are running version %3$s.' ), $wp_version, $required_mysql_version, $mysql_version );
+	/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required MySQL version number, 4: Current MySQL version number */
+	$compat = sprintf( __( 'You cannot install because <a href="%1$s">WordPress %2$s</a> requires MySQL version %3$s or higher. You are running version %4$s.' ), $version_url, $wp_version, $required_mysql_version, $mysql_version );
 }
 
 if ( ! $mysql_compat || ! $php_compat ) {
diff --git a/wp-admin/update-core.php b/wp-admin/update-core.php
index abc4f8418f..965d49199f 100644
--- a/wp-admin/update-core.php
+++ b/wp-admin/update-core.php
@@ -70,17 +70,24 @@ function list_core_update( $update ) {
 				$mysql_compat = version_compare( $mysql_version, $update->mysql_version, '>=' );
 			}
 
+			$version_url = sprintf(
+				/* translators: %s: WordPress version */
+				esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+				sanitize_title( $update->current )
+			);
+
 			if ( ! $mysql_compat && ! $php_compat ) {
-				/* translators: 1: WordPress version number, 2: Minimum required PHP version number, 3: Minimum required MySQL version number, 4: Current PHP version number, 5: Current MySQL version number */
-				$message = sprintf( __( 'You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.' ), $update->current, $update->php_version, $update->mysql_version, $php_version, $mysql_version );
+				/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Minimum required MySQL version number, 5: Current PHP version number, 6: Current MySQL version number */
+				$message = sprintf( __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher and MySQL version %4$s or higher. You are running PHP version %5$s and MySQL version %6$s.' ), $version_url, $update->current, $update->php_version, $update->mysql_version, $php_version, $mysql_version );
 			} elseif ( ! $php_compat ) {
-				/* translators: 1: WordPress version number, 2: Minimum required PHP version number, 3: Current PHP version number */
-				$message = sprintf( __( 'You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher. You are running version %3$s.' ), $update->current, $update->php_version, $php_version );
+				/* translators: 1: URL to WordPress release notes, 1: WordPress version number, 2: Minimum required PHP version number, 3: Current PHP version number */
+				$message = sprintf( __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher. You are running version %4$s.' ), $version_url, $update->current, $update->php_version, $php_version );
 			} elseif ( ! $mysql_compat ) {
 				/* translators: 1: WordPress version number, 2: Minimum required MySQL version number, 3: Current MySQL version number */
-				$message = sprintf( __( 'You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires MySQL version %2$s or higher. You are running version %3$s.' ), $update->current, $update->mysql_version, $mysql_version );
-			} else {              /* translators: 1: WordPress version number, 2: WordPress version number including locale if necessary */
-				$message = sprintf( __( 'You can update to <a href="https://codex.wordpress.org/Version_%1$s">WordPress %2$s</a> automatically:' ), $update->current, $version_string );
+				$message = sprintf( __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires MySQL version %3$s or higher. You are running version %4$s.' ), $version_url, $update->current, $update->mysql_version, $mysql_version );
+			} else {
+				/* translators: 1: URL to WordPress release notes, 2: WordPress version number including locale if necessary */
+				$message = sprintf( __( 'You can update to <a href="%1$s">WordPress %2$s</a> automatically:' ), $version_url, $version_string );
 			}
 			if ( ! $mysql_compat || ! $php_compat ) {
 				$show_buttons = false;
diff --git a/wp-admin/upgrade.php b/wp-admin/upgrade.php
index 9d701781c4..743b89e740 100644
--- a/wp-admin/upgrade.php
+++ b/wp-admin/upgrade.php
@@ -80,12 +80,21 @@ if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) ) {
 
 	<?php
 elseif ( ! $php_compat || ! $mysql_compat ) :
+	$version_url = sprintf(
+		/* translators: %s: WordPress version */
+		esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+		sanitize_title( $wp_version )
+	);
+
 	if ( ! $mysql_compat && ! $php_compat ) {
-		printf( __( 'You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.' ), $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version );
+		/* translators: 1: URL to WordPress release notes, 2: WordPress version number, 3: Minimum required PHP version number, 4: Minimum required MySQL version number, 5: Current PHP version number, 6: Current MySQL version number */
+		$message = sprintf( __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher and MySQL version %4$s or higher. You are running PHP version %5$s and MySQL version %6$s.' ), $version_url, $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version );
 	} elseif ( ! $php_compat ) {
-		printf( __( 'You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher. You are running version %3$s.' ), $wp_version, $required_php_version, $php_version );
+		/* translators: 1: URL to WordPress release notes, 1: WordPress version number, 2: Minimum required PHP version number, 3: Current PHP version number */
+		$message = sprintf( __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires PHP version %3$s or higher. You are running version %4$s.' ), $version_url, $wp_version, $required_php_version, $php_version );
 	} elseif ( ! $mysql_compat ) {
-		printf( __( 'You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires MySQL version %2$s or higher. You are running version %3$s.' ), $wp_version, $required_mysql_version, $mysql_version );
+		/* translators: 1: WordPress version number, 2: Minimum required MySQL version number, 3: Current MySQL version number */
+		$message = sprintf( __( 'You cannot update because <a href="%1$s">WordPress %2$s</a> requires MySQL version %3$s or higher. You are running version %4$s.' ), $version_url, $wp_version, $required_mysql_version, $mysql_version );
 	}
 	?>
 	<?php
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c61926acab..3db990249d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44450';
+$wp_version = '5.1-alpha-44451';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.