diff --git a/client/requirements.txt b/client/requirements.txt
index 5c56cf9a..1f89c622 100644
--- a/client/requirements.txt
+++ b/client/requirements.txt
@@ -11,3 +11,4 @@ win_inet_pton
 dnslib
 dukpy
 zeroconf==0.19.1
+python-ntlm
diff --git a/client/sources/build-docker.sh b/client/sources/build-docker.sh
index a919b4ce..417d969a 100755
--- a/client/sources/build-docker.sh
+++ b/client/sources/build-docker.sh
@@ -9,7 +9,7 @@ PACKAGES="$PACKAGES pyaudio https://github.com/secdev/scapy/archive/master.zip c
 PACKAGES="$PACKAGES https://github.com/AlessandroZ/pypykatz/archive/master.zip"
 PACKAGES="$PACKAGES https://github.com/warner/python-ed25519/archive/master.zip"
 PACKAGES="$PACKAGES https://github.com/alxchk/tinyec/archive/master.zip"
-PACKAGES="$PACKAGES adodbapi idna wmi winkerberos http_parser"
+PACKAGES="$PACKAGES adodbapi idna wmi winkerberos http_parser python-ntlm"
 
 SELF=`readlink -f "$0"`
 SELFPWD=`dirname "$SELF"`