diff --git a/source-postgres/.snapshots/TestConfigURI-Basic b/source-postgres/.snapshots/TestConfigURI-Basic
index 916d2f44ec..6035dc435b 100644
--- a/source-postgres/.snapshots/TestConfigURI-Basic
+++ b/source-postgres/.snapshots/TestConfigURI-Basic
@@ -1,2 +1,2 @@
-postgres://will:secret1234@example.com:5432/somedb
+postgres://will:secret1234@example.com:5432/somedb?application_name=estuary_flow
 config valid
diff --git a/source-postgres/.snapshots/TestConfigURI-IncorrectSSL b/source-postgres/.snapshots/TestConfigURI-IncorrectSSL
index 21d5381a60..2668daa1c1 100644
--- a/source-postgres/.snapshots/TestConfigURI-IncorrectSSL
+++ b/source-postgres/.snapshots/TestConfigURI-IncorrectSSL
@@ -1,2 +1,2 @@
-postgres://will:secret1234@example.com:5432/somedb?sslmode=whoops-this-isnt-right
+postgres://will:secret1234@example.com:5432/somedb?application_name=estuary_flow&sslmode=whoops-this-isnt-right
 invalid 'sslmode' configuration: unknown setting "whoops-this-isnt-right"
diff --git a/source-postgres/.snapshots/TestConfigURI-RequireSSL b/source-postgres/.snapshots/TestConfigURI-RequireSSL
index 45ce8b198a..b181ea86e2 100644
--- a/source-postgres/.snapshots/TestConfigURI-RequireSSL
+++ b/source-postgres/.snapshots/TestConfigURI-RequireSSL
@@ -1,2 +1,2 @@
-postgres://will:secret1234@example.com:5432/somedb?sslmode=verify-full
+postgres://will:secret1234@example.com:5432/somedb?application_name=estuary_flow&sslmode=verify-full
 config valid
diff --git a/source-postgres/main.go b/source-postgres/main.go
index 9502758025..6dad8cf025 100644
--- a/source-postgres/main.go
+++ b/source-postgres/main.go
@@ -227,6 +227,7 @@ func (c *Config) ToURI() string {
 		uri.Path = "/" + c.Database
 	}
 	var params = make(url.Values)
+	params.Set("application_name", "estuary_flow")
 	if c.Advanced.SSLMode != "" {
 		params.Set("sslmode", c.Advanced.SSLMode)
 	}