diff --git a/chainladder/__init__.py b/chainladder/__init__.py
index f9e7bf74..92e41d6c 100644
--- a/chainladder/__init__.py
+++ b/chainladder/__init__.py
@@ -42,4 +42,4 @@ def auto_sparse(auto_sparse=True):
 from chainladder.methods import *  # noqa (API Import)
 from chainladder.workflow import *  # noqa (API Import)
 
-__version__ = "0.8.17"
+__version__ = "0.9.0"
diff --git a/chainladder/development/clark.py b/chainladder/development/clark.py
index ed470e38..670a12af 100644
--- a/chainladder/development/clark.py
+++ b/chainladder/development/clark.py
@@ -184,7 +184,7 @@ def solver(x):
                     x0 = xp.array([[[[1.0, age_interval]]]])
                     bounds = ((1e-6, None), (1e-6, None))
                 idx_params.append(
-                    minimize(fun=solver, x0=x0, bounds=bounds).x.reshape(1, 1, 1, -1)
+                    minimize(fun=solver, x0=x0.flatten(), bounds=bounds).x.reshape(1, 1, 1, -1)
                 )
             params.append(xp.concatenate(idx_params, axis=1))
         params = xp.concatenate(params, axis=0)
diff --git a/setup.py b/setup.py
index d5b05204..52e385a6 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
 descr = "Chainladder Package - P&C Loss Reserving package "
 name = 'chainladder'
 url = 'https://github.com/casact/chainladder-python'
-version='0.8.17' # Put this in __init__.py
+version='0.9.0' # Put this in __init__.py
 
 data_path = ''
 setup(