diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index fbcbc8d..a752aef 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,6 +1,6 @@
 {
     "firmware/charger-module": "0.3.0",
-    "hardware/backplane": "0.7.3",
+    "hardware/backplane": "0.7.4",
     "hardware/charger-module": "0.11.4",
     "hardware/esp32-mgmt-module": "0.3.1",
     "hardware/pi-pico-mgmt-module": "0.5.0",
diff --git a/hardware/backplane/CHANGELOG.md b/hardware/backplane/CHANGELOG.md
index 4a8bbe4..7529ada 100644
--- a/hardware/backplane/CHANGELOG.md
+++ b/hardware/backplane/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.7.4](https://github.com/mikesmitty/power-manifold/compare/backplane-v0.7.3...backplane-v0.7.4) (2024-08-02)
+
+
+### Bug Fixes
+
+* make sure the input has a gnd ([9e89fb6](https://github.com/mikesmitty/power-manifold/commit/9e89fb69b0984d57c87f4afeee9d4b00b62a6423))
+
 ## [0.7.3](https://github.com/mikesmitty/power-manifold/compare/backplane-v0.7.2...backplane-v0.7.3) (2024-08-01)
 
 
diff --git a/hardware/backplane/backplane.kicad_pcb b/hardware/backplane/backplane.kicad_pcb
index bfce65a..cf3f274 100644
--- a/hardware/backplane/backplane.kicad_pcb
+++ b/hardware/backplane/backplane.kicad_pcb
@@ -9,7 +9,7 @@
 	(paper "A4")
 	(title_block
 		(date "2024-06-09")
-		(rev "v0.7.3")
+		(rev "v0.7.4")
 	)
 	(layers
 		(0 "F.Cu" signal)
diff --git a/hardware/backplane/backplane.kicad_sch b/hardware/backplane/backplane.kicad_sch
index 1d624db..de4f65c 100644
--- a/hardware/backplane/backplane.kicad_sch
+++ b/hardware/backplane/backplane.kicad_sch
@@ -6,7 +6,7 @@
 	(paper "A3")
 	(title_block
 		(date "2024-06-27")
-		(rev "v0.7.3")
+		(rev "v0.7.4")
 	)
 	(lib_symbols
 		(symbol "74xx:74HC4051"