--- title: 4.0.15 Released | daily.dev description: RubyGems 4.0.15 and Bundler 4.0.15 have been released with enhancements and bug fixes. Key changes include PQC (post-quantum cryptography) support fixes for... canonical: https://daily.dev/posts/4-0-15-released-kxxpctjwb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: 4.0.15 Released | daily.dev og:description: RubyGems 4.0.15 and Bundler 4.0.15 have been released with enhancements and bug fixes. Key changes include PQC (post-quantum cryptography) support fixes for... og:url: https://daily.dev/posts/4-0-15-released-kxxpctjwb og:image: https://api.daily.dev/og/posts/kxxpcTJwb.png og:image:alt: 4.0.15 Released og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # 4.0.15 Released **[RUBYLAND](https://daily.dev/sources/rubyla)** · 2 min read · 1 upvotes · 0 comments ## Summary RubyGems 4.0.15 and Bundler 4.0.15 have been released with enhancements and bug fixes. Key changes include PQC (post-quantum cryptography) support fixes for Gem::Request, reduced peak memory usage during full index loading and bundle install, Git LFS file resolution from real remotes, a make jobserver implementation (with Windows skip), improved error messaging for missing locked gems, and several Bundler lockfile and SSL certificate fixes. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [4.0.16 Released](https://daily.dev/posts/4-0-16-released-x3cfsvjns) · RUBYLAND · 1 upvotes · 0 comments - [4.0.13 Released](https://daily.dev/posts/4-0-13-released-a34usskbo) · RUBYLAND · 1 upvotes · 0 comments - [4.0.12 Released](https://daily.dev/posts/4-0-12-released-udm916hek) · RUBYLAND · 1 upvotes · 0 comments --- Tags: [#ruby](https://daily.dev/tags/ruby) [View this post on daily.dev](https://daily.dev/posts/4-0-15-released-kxxpctjwb) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"4.0.15 Released","url":"https://daily.dev/posts/4-0-15-released-kxxpctjwb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/4-0-15-released-kxxpctjwb"},"datePublished":"2026-06-24T00:23:17.929Z","dateModified":"2026-06-24T00:23:38.350Z","description":"RubyGems 4.0.15 and Bundler 4.0.15 have been released with enhancements and bug fixes. Key changes include PQC (post-quantum cryptography) support fixes for...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/74bcde464f6963c0ce9c6624cc1e58a4?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/74bcde464f6963c0ce9c6624cc1e58a4?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"RUBYLAND","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"RUBYLAND","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/rubyla","url":"https://daily.dev/sources/rubyla"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/4-0-15-released-kxxpctjwb","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ruby","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"RUBYLAND","item":"https://daily.dev/sources/rubyla"},{"@type":"ListItem","position":3,"name":"4.0.15 Released"}]} ```