diff --git a/main.go b/main.go
index 38c7141cc..1ffd8a343 100644
--- a/main.go
+++ b/main.go
@@ -79,6 +79,9 @@ func realMain() int {
 	log.Printf(
 		"[INFO] Terraform version: %s %s",
 		Version, VersionPrerelease)
+	for _, depMod := range version.InterestingDependencies() {
+		log.Printf("[DEBUG] using %s %s", depMod.Path, depMod.Version)
+	}
 	log.Printf("[INFO] Go runtime version: %s", runtime.Version())
 	log.Printf("[INFO] CLI args: %#v", os.Args)
 
diff --git a/version/dependencies.go b/version/dependencies.go
new file mode 100644
index 000000000..155d7eafc
--- /dev/null
+++ b/version/dependencies.go
@@ -0,0 +1,44 @@
+package version
+
+import "runtime/debug"
+
+// See the docs for InterestingDependencyVersions to understand what
+// "interesting" is intended to mean here. We should keep this set relatively
+// small to avoid bloating the logs too much.
+var interestingDependencies = map[string]struct{}{
+	"github.com/hashicorp/hcl/v2":                   {},
+	"github.com/zclconf/go-cty":                     {},
+	"github.com/hashicorp/go-tfe":                   {},
+	"github.com/hashicorp/terraform-config-inspect": {},
+	"github.com/hashicorp/terraform-svchost":        {},
+}
+
+// InterestingDependencies returns the compiled-in module version info for
+// a small number of dependencies that Terraform uses broadly and which we
+// tend to upgrade relatively often as part of improvements to Terraform.
+//
+// The set of dependencies this reports might change over time if our
+// opinions change about what's "interesting". This is here only to create
+// a small number of extra annotations in a debug log to help us more easily
+// cross-reference bug reports with dependency changelogs.
+func InterestingDependencies() []*debug.Module {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		// Weird to not be built in module mode, but not a big deal.
+		return nil
+	}
+
+	ret := make([]*debug.Module, 0, len(interestingDependencies))
+
+	for _, mod := range info.Deps {
+		if _, ok := interestingDependencies[mod.Path]; !ok {
+			continue
+		}
+		if mod.Replace != nil {
+			mod = mod.Replace
+		}
+		ret = append(ret, mod)
+	}
+
+	return ret
+}