Index: node_modules/semver/classes/semver.js
===================================================================
--- node_modules/semver/classes/semver.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/semver/classes/semver.js	(revision 6c7cfa631d14a25615bca6e638d689aaeb21e1a2)
@@ -7,4 +7,20 @@
 const parseOptions = require('../internal/parse-options')
 const { compareIdentifiers } = require('../internal/identifiers')
+
+const isPrereleaseIdentifier = (prerelease, identifier) => {
+  const identifiers = identifier.split('.')
+  if (identifiers.length > prerelease.length) {
+    return false
+  }
+
+  for (let i = 0; i < identifiers.length; i++) {
+    if (compareIdentifiers(prerelease[i], identifiers[i]) !== 0) {
+      return false
+    }
+  }
+
+  return true
+}
+
 class SemVer {
   constructor (version, options) {
@@ -310,6 +326,7 @@
             prerelease = [identifier]
           }
-          if (compareIdentifiers(this.prerelease[0], identifier) === 0) {
-            if (isNaN(this.prerelease[1])) {
+          if (isPrereleaseIdentifier(this.prerelease, identifier)) {
+            const prereleaseBase = this.prerelease[identifier.split('.').length]
+            if (isNaN(prereleaseBase)) {
               this.prerelease = prerelease
             }