diff --git a/defaults/main.yml b/defaults/main.yml
index 0494573..1e4d3ef 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -135,7 +135,7 @@ archivematica_src_ssl_include_acme_chlg_loc: "false"
 #
 
 # Pip version
-archivematica_src_pip_tools_version: "5.5.0"
+archivematica_src_pip_tools_version: "6.4.0"
 
 # Sample data
 archivematica_src_install_sample_data_timeout: "3600"