diff --git a/Makefile b/Makefile
index ba14699..66ed30d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,9 @@
 POLICY_SRC := ../contracts/agent-policy.json
 POLICY_DST := internal/policy/agent-policy.json
-VERSION    ?= 0.1.0
+# The version stamped into the binary, and the tag scripts/release.sh publishes under. It is the
+# agent's own version rather than the app's: the two are released together but a node can be running an
+# older agent than the phone, and the handshake's `agentBuild` field is what makes that visible.
+VERSION    ?= 0.3.0
 LDFLAGS    := -s -w -X main.version=$(VERSION)
 
 .PHONY: all vendor test vet build build-arm64 build-armv7 clean