diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ad31dd8..174df8b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -33,7 +33,7 @@ jobs:
     - name: '📦 Install Sail RISC-V reference model'
       run: |
         mkdir $GITHUB_WORKSPACE/sail-riscv
-        wget -q https://github.com/riscv/sail-riscv/releases/download/0.8/sail-riscv-Linux-x86_64.tar.gz
+        wget -q https://github.com/riscv/sail-riscv/releases/download/0.9/sail-riscv-Linux-x86_64.tar.gz
         tar -xzf $GITHUB_WORKSPACE/sail-riscv-Linux-x86_64.tar.gz -C $GITHUB_WORKSPACE/sail-riscv
         ls -al $GITHUB_WORKSPACE/sail-riscv/sail-riscv-Linux-x86_64/bin
         echo $GITHUB_WORKSPACE/sail-riscv/sail-riscv-Linux-x86_64/bin >> $GITHUB_PATH
@@ -42,6 +42,7 @@ jobs:
       run: |
         echo "upstream RISCOF is broken! https://github.com/riscv-software-src/riscof/issues/122"
         pip3 install git+https://github.com/riscv/riscof.git@d38859f85fe407bcacddd2efcd355ada4683aee4
+        pip3 install jsoncomment
 
     - name: '📦 Install GHDL'
       uses: ghdl/setup-ghdl@v1
diff --git a/plugin-sail_cSim/riscof_sail_cSim.py b/plugin-sail_cSim/riscof_sail_cSim.py
index 1fcfc7a..afa09f9 100644
--- a/plugin-sail_cSim/riscof_sail_cSim.py
+++ b/plugin-sail_cSim/riscof_sail_cSim.py
@@ -7,6 +7,7 @@
 import random
 import string
 import json
+from jsoncomment import JsonComment
 from string import Template
 
 import riscof.utils as utils
@@ -110,7 +111,9 @@ def runTests(self, testList, cgf_file=None, header_file= None):
 
         try:
             sail_config = subprocess.run(["sail_riscv_sim", "--print-default-config"], check= True, text=True, capture_output=True)
-            sail_config = json.loads(sail_config.stdout)
+            # Sail 0.9 generates non compliant JSON (contains C style inline comments)
+            parser = JsonComment(json)
+            sail_config = parser.loads(sail_config.stdout)
         except subprocess.CalledProcessError as e:
             print("sail_riscv_sim --print-default-config failed:", e.stderr)
             exit(1)
@@ -131,6 +134,9 @@ def runTests(self, testList, cgf_file=None, header_file= None):
         sail_config["extensions"]["Sv32"]["supported"] = True
         sail_config["extensions"]["Zcf"]["supported"] = True
 
+        # Disabling "Svrsw60t59b" since it is conflicting with disabled "Sv39"
+        sail_config["extensions"]["Svrsw60t59b"]["supported"] = False
+
         # For User-configuration: Replace this variable with your configuration. "/home/riscv-arch-test/custom_sail_config.json"
         sail_config_path = os.path.join(self.pluginpath, 'env', 'sail_config.json')