diff --git a/doc/libressl.md b/doc/libressl.md
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@@ -0,0 +1,17 @@
+# install libressl
+
+[download link](https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/)
+
+* download latest tarball from download link
+```
+cd ~
+mkdir tmp && cd tmp
+wget https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.7.0.tar.gz
+tar -xzvf libressl
+cd libressl
+mkdir build && cd build
+../configure
+make
+sudo make install
+sudo ldconfig
+```