diff --git a/acmed/Cargo.toml b/acmed/Cargo.toml
index 2639998..012df8b 100644
--- a/acmed/Cargo.toml
+++ b/acmed/Cargo.toml
@@ -18,6 +18,7 @@ handlebars = "2.0.0-beta.1"
 http_req = "0.4"
 log = "0.4"
 openssl = "0.10"
+openssl-sys = "0.9"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 time = "0.1"
diff --git a/acmed/build.rs b/acmed/build.rs
index 2902dd1..5907ccc 100644
--- a/acmed/build.rs
+++ b/acmed/build.rs
@@ -60,19 +60,58 @@ fn set_lock() {
         if p.name == "http_req" {
             let agent = format!("{}/{}", p.name, p.version);
             set_rustc_env_var!("ACMED_HTTP_LIB_AGENT", agent);
+            set_rustc_env_var!("ACMED_HTTP_LIB_NAME", p.name);
+            set_rustc_env_var!("ACMED_HTTP_LIB_VERSION", p.version);
             return;
         }
     }
 }
 
+fn get_openssl_version_unit(n: u64, pos: u32) -> u64 {
+    let p = 0xff_00_00_00_0 >> (8 * pos);
+    let n = n & p;
+    n >> (8 * (3 - pos) + 4)
+}
+
+fn get_openssl_version(v: &str) -> String {
+    let v = u64::from_str_radix(&v, 16).unwrap();
+    let mut version = vec![];
+    for i in 0..3 {
+        let n = get_openssl_version_unit(v, i);
+        version.push(format!("{}", n));
+    }
+    let version = version.join(".");
+    let p = get_openssl_version_unit(v, 3);
+    if p != 0 {
+        let p = p + 0x60;
+        let p = std::char::from_u32(p as u32).unwrap();
+        format!("{}{}", version, p)
+    } else {
+        version
+    }
+}
+
+fn set_tls() {
+    if let Ok(v) = env::var("DEP_OPENSSL_VERSION_NUMBER") {
+        let version = get_openssl_version(&v);
+        set_rustc_env_var!("ACMED_TLS_LIB_VERSION", version);
+        set_rustc_env_var!("ACMED_TLS_LIB_NAME", "OpenSSL");
+    }
+    if let Ok(v) = env::var("DEP_OPENSSL_LIBRESSL_VERSION_NUMBER") {
+        let version = get_openssl_version(&v);
+        set_rustc_env_var!("ACMED_TLS_LIB_VERSION", version);
+        set_rustc_env_var!("ACMED_TLS_LIB_NAME", "LibreSSL");
+    }
+}
+
 fn set_target() {
-    match env::var("TARGET") {
-        Ok(target) => set_rustc_env_var!("ACMED_TARGET", target),
-        Err(_) => {}
+    if let Ok(target) = env::var("TARGET") {
+        set_rustc_env_var!("ACMED_TARGET", target);
     };
 }
 
 fn main() {
     set_target();
+    set_tls();
     set_lock();
 }
diff --git a/acmed/src/main.rs b/acmed/src/main.rs
index 1d2a190..ecd0840 100644
--- a/acmed/src/main.rs
+++ b/acmed/src/main.rs
@@ -32,8 +32,18 @@ pub const DEFAULT_HTTP_FAIL_WAIT_SEC: u64 = 1;
 pub const DEFAULT_HOOK_ALLOW_FAILURE: bool = false;
 
 fn main() {
+    let full_version = format!(
+        "{} {}\n\nCompiled with:\n  {} {}\n  {} {}",
+        APP_VERSION,
+        env!("ACMED_TARGET"),
+        env!("ACMED_TLS_LIB_NAME"),
+        env!("ACMED_TLS_LIB_VERSION"),
+        env!("ACMED_HTTP_LIB_NAME"),
+        env!("ACMED_HTTP_LIB_VERSION")
+    );
     let matches = App::new(APP_NAME)
         .version(APP_VERSION)
+        .long_version(full_version.as_str())
         .arg(
             Arg::with_name("config")
                 .short("c")