diff --git a/chttp.c b/chttp.c
index e09c546..43d1778 100644
--- a/chttp.c
+++ b/chttp.c
@@ -1868,7 +1868,7 @@ int server_secure_context_init(ServerSecureContext *ctx,
     key_buffer[key_file.len] = '\0';
 
     // Load certificate and private key
-    if (SSL_CTX_use_certificate_file(p, cert_buffer, SSL_FILETYPE_PEM) != 1) {
+    if (SSL_CTX_use_certificate_chain_file(p, cert_buffer) != 1) {
         SSL_CTX_free(p);
         return -1;
     }
@@ -1938,7 +1938,7 @@ int server_secure_context_add_certificate(ServerSecureContext *ctx,
     memcpy(key_buffer, key_file.ptr, key_file.len);
     key_buffer[key_file.len] = '\0';
 
-    if (SSL_CTX_use_certificate_file(p, cert_buffer, SSL_FILETYPE_PEM) != 1) {
+    if (SSL_CTX_use_certificate_chain_file(p, cert_buffer) != 1) {
         SSL_CTX_free(p);
         return -1;
     }
diff --git a/src/secure_context.c b/src/secure_context.c
index b068592..2cd0541 100644
--- a/src/secure_context.c
+++ b/src/secure_context.c
@@ -103,7 +103,7 @@ int server_secure_context_init(ServerSecureContext *ctx,
     key_buffer[key_file.len] = '\0';
 
     // Load certificate and private key
-    if (SSL_CTX_use_certificate_file(p, cert_buffer, SSL_FILETYPE_PEM) != 1) {
+    if (SSL_CTX_use_certificate_chain_file(p, cert_buffer) != 1) {
         SSL_CTX_free(p);
         return -1;
     }
@@ -173,7 +173,7 @@ int server_secure_context_add_certificate(ServerSecureContext *ctx,
     memcpy(key_buffer, key_file.ptr, key_file.len);
     key_buffer[key_file.len] = '\0';
 
-    if (SSL_CTX_use_certificate_file(p, cert_buffer, SSL_FILETYPE_PEM) != 1) {
+    if (SSL_CTX_use_certificate_chain_file(p, cert_buffer) != 1) {
         SSL_CTX_free(p);
         return -1;
     }