diff --git a/src/OpenSSL.jl b/src/OpenSSL.jl
index d433987..234df29 100644
--- a/src/OpenSSL.jl
+++ b/src/OpenSSL.jl
@@ -7,7 +7,7 @@ const libssl = "/gnu/store/hcxpkksmbql6s4al8yy2myr25kh4cic0-openssl-1.1.1g/lib/l
 include("consts.jl")
 include("evp_md.jl")
 include("types.jl")
-export SSLContext, SSLClient
+export SSLContext, SSLClient, CAChain
 
 include("methods.jl")
 
diff --git a/src/types.jl b/src/types.jl
index 3a4c7bc..944ff15 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -8,6 +8,11 @@ struct SSL_Context ptr end
     ServerMode
 end
 
+struct CAChain
+    cert
+    key
+end
+
 mutable struct SSLContext <: IO
     data::Vector{UInt8}
     ptr::Ptr{SSL_Context}