diff --git a/.gitmodules b/.gitmodules
index ca097a125..b5ae648b7 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,3 @@
-[submodule "sky130/sky130_osu_sc_t12"]
-	path = sky130/sky130_osu_sc_t12
-	url = https://foss-eda-tools.googlesource.com/skywater-pdk/libs/sky130_osu_sc_t12/
-[submodule "addins/imperas-riscv-tests"]
-	path = addins/imperas-riscv-tests
-	url = https://github.com/riscv-ovpsim/imperas-riscv-tests
 [submodule "addins/riscv-dv"]
 	path = addins/riscv-dv
 	url = https://github.com/google/riscv-dv
@@ -29,4 +23,4 @@
 	url = https://github.com/ross144/branch-predictor-simulator
 [submodule "addins/ahbsdc"]
 	path = addins/ahbsdc
-	url = http://github.com/JacobPease/ahbsdc.git
+	url = https://github.com/JacobPease/ahbsdc.git