diff --git a/Readme.md b/Readme.md
index faa3db2..17f37fe 100644
--- a/Readme.md
+++ b/Readme.md
@@ -12,6 +12,8 @@
 
 ## Recent Updates
 
+* **version 6.12.4 12sep2023**:
+    - Fix `ivreghdfe` bug when clustering with string variables (#276)
 * **version 6.12.3 20aug2023**:
     - Bugfix for parallel option (macOS)
     - Fix typos in help file
diff --git a/current-code/reghdfe.ado b/current-code/reghdfe.ado
index 7cc50c2..d25d23f 100644
--- a/current-code/reghdfe.ado
+++ b/current-code/reghdfe.ado
@@ -1,4 +1,4 @@
-*! version 6.12.3 08aug2023
+*! version 6.12.4 12sep2023
 program define reghdfe
 	
 	* Intercept storing alphas
@@ -260,7 +260,7 @@ program Estimate, eclass
 		* We will just create and fill the HDFE object
 		loc touse `varlist'
 		loc varlist
-		markout `touse' `base_clustervars' `group_id' `individual_id'
+		markout `touse' `base_clustervars' `group_id' `individual_id', strok
 	}
 	else {
 		* Set sample based on if + in + weight + group + individual + cluster variables + regression varlist (i.e. excluding absvars)
diff --git a/current-code/reghdfe.pkg b/current-code/reghdfe.pkg
index c012f3f..f63bcb2 100644
--- a/current-code/reghdfe.pkg
+++ b/current-code/reghdfe.pkg
@@ -31,7 +31,7 @@ d
 d Required packages:
 d 	ftools
 d
-d Distribution-Date: 20230820
+d Distribution-Date: 20230912
 d
 
 f reghdfe.ado
diff --git a/current-code/reghdfe.sthlp b/current-code/reghdfe.sthlp
index b33fb9c..01d9def 100644
--- a/current-code/reghdfe.sthlp
+++ b/current-code/reghdfe.sthlp
@@ -1,5 +1,5 @@
 {smcl}
-{* *! version 6.12.3 08aug2023}{...}
+{* *! version 6.12.4 12sep2023}{...}
 {vieweralsosee "[R] areg" "help areg"}{...}
 {vieweralsosee "[R] xtreg" "help xtreg"}{...}
 {vieweralsosee "" "--"}{...}
diff --git a/src/reghdfe.ado b/src/reghdfe.ado
index 7cc50c2..d25d23f 100644
--- a/src/reghdfe.ado
+++ b/src/reghdfe.ado
@@ -1,4 +1,4 @@
-*! version 6.12.3 08aug2023
+*! version 6.12.4 12sep2023
 program define reghdfe
 	
 	* Intercept storing alphas
@@ -260,7 +260,7 @@ program Estimate, eclass
 		* We will just create and fill the HDFE object
 		loc touse `varlist'
 		loc varlist
-		markout `touse' `base_clustervars' `group_id' `individual_id'
+		markout `touse' `base_clustervars' `group_id' `individual_id', strok
 	}
 	else {
 		* Set sample based on if + in + weight + group + individual + cluster variables + regression varlist (i.e. excluding absvars)
diff --git a/src/reghdfe.pkg b/src/reghdfe.pkg
index 925fe51..d657dc5 100644
--- a/src/reghdfe.pkg
+++ b/src/reghdfe.pkg
@@ -31,7 +31,7 @@ d
 d Required packages:
 d 	ftools
 d
-d Distribution-Date: 20230820
+d Distribution-Date: 20230912
 d
 
 f reghdfe.ado
diff --git a/src/reghdfe.sthlp b/src/reghdfe.sthlp
index b33fb9c..01d9def 100644
--- a/src/reghdfe.sthlp
+++ b/src/reghdfe.sthlp
@@ -1,5 +1,5 @@
 {smcl}
-{* *! version 6.12.3 08aug2023}{...}
+{* *! version 6.12.4 12sep2023}{...}
 {vieweralsosee "[R] areg" "help areg"}{...}
 {vieweralsosee "[R] xtreg" "help xtreg"}{...}
 {vieweralsosee "" "--"}{...}
diff --git a/test/test-dependencies.do b/test/test-dependencies.do
new file mode 100644
index 0000000..28f1aed
--- /dev/null
+++ b/test/test-dependencies.do
@@ -0,0 +1,39 @@
+* ===========================================================================
+* Test that all upstream/downstream reghdfe dependencies work
+* ===========================================================================
+* Note: this changes PLUS so best to restart Stata afterwards
+
+	clear all
+
+
+// --------------------------------------------------------------------------
+// Test SSC
+// --------------------------------------------------------------------------
+
+	tempfile adopath
+	loc adopath "C:\Git\asd\fakeado"
+	di as text `"tempfile=`adopath'"'
+	*mkdir "`adopath'", public
+
+	sysdir set PLUS "`adopath'"
+
+	net install require, from("C:\Git\stata-require\src") // SSC version is still 1.1.1
+	require moremata				, install
+	require require   >= 1.3		, install
+	require ftools    >= 2.49.1		, install
+	require reghdfe   >= 6.12.3		, install
+	require ppmlhdfe  >= 2.3.0		, install
+	*require ivreghdfe >= 1.1.3		, install // problem: SSC still has ivreghdfe 1.0.0
+
+	sysuse auto
+	fcollapse (sum) price, by(turn)
+
+	sysuse auto, clear
+	reghdfe price weight length, a(turn)
+	*ivreghdfe price (weight=length), a(turn)
+
+	set trace on
+	set tracedepth 1
+	ppmlhdfe turn weight length, a(trunk)
+
+exit