diff --git a/testssl.sh b/testssl.sh
index 04b2cf4..02d246b 100755
--- a/testssl.sh
+++ b/testssl.sh
@@ -90,7 +90,7 @@ egrep -q "dev|rc" <<< "$VERSION" && \
      SWURL="https://testssl.sh/    "
 
 readonly PROG_NAME=$(basename "$0")
-readonly RUN_DIR=$(dirname "$0")
+readonly RUN_DIR=$(dirname "$(readlink -e $0)")
 INSTALL_DIR=""
 MAPPING_FILE_RFC=""
 OPENSSL_LOCATION=""
@@ -5391,7 +5391,7 @@ old_fart() {
 # it provides "keycode/ RFC style name", see RFCs, cipher(1), www.carbonwind.net/TLS_Cipher_Suites_Project/tls_ssl_cipher_suites_simple_table_all.htm
 get_install_dir() {
      #INSTALL_DIR=$(cd "$(dirname "$0")" && pwd)/$(basename "$0")
-     INSTALL_DIR=$(dirname ${BASH_SOURCE[0]})
+     INSTALL_DIR=$(dirname "$(readlink -e ${BASH_SOURCE[0]})")
 
      [[ -r "$RUN_DIR/etc/mapping-rfc.txt" ]] && MAPPING_FILE_RFC="$RUN_DIR/etc/mapping-rfc.txt"
      [[ -r "$INSTALL_DIR/etc/mapping-rfc.txt" ]] && MAPPING_FILE_RFC="$INSTALL_DIR/etc/mapping-rfc.txt"