diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1222214..b2f6bc4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,10 @@
 
 ### v0.9.0 (unreleased)
 
-N/A
+#### Fixes
+
+- Fix not sending the complete certificate chain for TLS certificates
+  that include it.
 
 ### v0.8.2 (2021-03-21)
 
diff --git a/jetforce/tls.py b/jetforce/tls.py
index 641fa66..5cf8312 100644
--- a/jetforce/tls.py
+++ b/jetforce/tls.py
@@ -179,7 +179,7 @@ class GeminiCertificateOptions(CertificateOptions):
         ctx.set_options(self._options)
         ctx.set_mode(self._mode)
 
-        ctx.use_certificate_file(self.certfile)
+        ctx.use_certificate_chain_file(self.certfile)
         ctx.use_privatekey_file(self.keyfile or self.certfile)
         for extraCert in self.extraCertChain:
             ctx.add_extra_chain_cert(extraCert)