diff --git a/README.md b/README.md
index de76ae1..32b5a0e 100644
--- a/README.md
+++ b/README.md
@@ -34,8 +34,8 @@ The following environment variables configure the snapshot generated by the `Git
 - `GITHUB_DEPENDENCY_GRAPH_JOB_ID`: Sets the `job.id` value for the dependency submission
 - `GITHUB_DEPENDENCY_GRAPH_REF`: Sets the `ref` value for the commit that generated the dependency graph
 - `GITHUB_DEPENDENCY_GRAPH_SHA`: Sets the `sha` value for the commit that generated the dependency graph
-- `GITHUB_DEPENDENCY_GRAPH_WORKSPACE`: Sets the root directory of the github repository
-- `DEPENDENCY_GRAPH_REPORT_DIR` (optional): Specifies where the dependency graph report will be generated
+- `GITHUB_DEPENDENCY_GRAPH_WORKSPACE`: Sets the root directory of the github repository. Must be an absolute path.
+- `DEPENDENCY_GRAPH_REPORT_DIR` (optional): Specifies where the dependency graph report will be generated. Must be an absolute path.
 
 Each of these values can also be provided via a system property. 
 eg: Env var `DEPENDENCY_GRAPH_REPORT_DIR` can be set with `-DDEPENDENCY_GRAPH_REPORT_DIR=...` on the command-line.