diff --git a/pyproject.toml b/pyproject.toml
index 11d36d0ac..f13e67020 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,8 @@ dependencies = [
     "packaging",
     "parsel>=1.5.0",
     "protego>=0.1.15",
-    "pyOpenSSL>=22.0.0",
+    # pyOpenSSL pinned until Twisted with immutable contexts is released and supported in Scrapy
+    "pyOpenSSL>=22.0.0,<26.2.0",
     "queuelib>=1.4.2",
     "service_identity>=18.1.0",
     "tldextract",