diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..8b43b17b
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [Unreleased Changes](https://github.com/thouska/spotpy/compare/v1.5.13...master)
+
+## Spotpy Version [1.5.13](https://github.com/thouska/spotpy/compare/v1.5.12...v1.5.13) (2020-09-07)
+
+* Introducing package dependencies as requested [#249](https://github.com/thouska/spotpy/issues/249)
+* Introducing chanchelog.md as requested [#225](https://github.com/thouska/spotpy/issues/225)
diff --git a/spotpy/algorithms/padds.py b/spotpy/algorithms/padds.py
index 23f3885c..7557b2de 100644
--- a/spotpy/algorithms/padds.py
+++ b/spotpy/algorithms/padds.py
@@ -90,6 +90,9 @@ def __init__(self, *args, **kwargs):
         except KeyError:
             self.r = 0.2  # default value
 
+        kwargs['optimization_direction'] = 'minimize'
+        kwargs['algorithm_name'] = 'Pareto Archived Dynamically Dimensioned Search (PADDS) algorithm'
+
         super(padds, self).__init__(*args, **kwargs)
 
         self.np_random = np.random
diff --git a/spotpy/examples/spot_setup_hymod_python_pareto.py b/spotpy/examples/spot_setup_hymod_python_pareto.py
index ceb2fffa..b4e97b31 100644
--- a/spotpy/examples/spot_setup_hymod_python_pareto.py
+++ b/spotpy/examples/spot_setup_hymod_python_pareto.py
@@ -61,12 +61,6 @@ def evaluation(self):
         return self.trueObs[366:]
     
     def objectivefunction(self,simulation,evaluation, params=None):
-        return np.array([
-            spotpy.likelihoods.gaussianLikelihoodMeasErrorOut(evaluation, simulation),
-            -spotpy.objectivefunctions.rmse(evaluation, simulation),
-            -spotpy.objectivefunctions.mse(evaluation, simulation),
-            -spotpy.objectivefunctions.pbias(evaluation, simulation),
-            spotpy.likelihoods.NashSutcliffeEfficiencyShapingFactor(evaluation, simulation),
-            spotpy.likelihoods.ABCBoxcarLikelihood(evaluation, simulation),
-            spotpy.likelihoods.LikelihoodAR1NoC(evaluation, simulation)
-        ])
\ No newline at end of file
+        return [-abs(spotpy.objectivefunctions.bias(evaluation, simulation)),
+            spotpy.objectivefunctions.rsquared(evaluation, simulation),
+            spotpy.objectivefunctions.nashsutcliffe(evaluation, simulation)]
\ No newline at end of file
diff --git a/spotpy/examples/tutorial_dds_hymod.py b/spotpy/examples/tutorial_dds_hymod.py
index f94a061c..7eb52eb2 100644
--- a/spotpy/examples/tutorial_dds_hymod.py
+++ b/spotpy/examples/tutorial_dds_hymod.py
@@ -27,7 +27,7 @@
     # Initialize the Hymod example
     # In this case, we tell the setup which algorithm we want to use, so
     # we can use this exmaple for different algorithms
-    spot_setup=spot_setup(users_objective_function=spotpy.objectivefunctions.nashsutcliffe)
+    spot_setup=spot_setup(spotpy.objectivefunctions.nashsutcliffe)
     
     #Select number of maximum allowed repetitions
     rep=1000
diff --git a/spotpy/examples/tutorial_padds_hymod.py b/spotpy/examples/tutorial_padds_hymod.py
index 7a9c695c..c239285f 100644
--- a/spotpy/examples/tutorial_padds_hymod.py
+++ b/spotpy/examples/tutorial_padds_hymod.py
@@ -16,10 +16,17 @@
     sys.path.append(".")
     import spotpy
 
-from spotpy.examples.spot_setup_hymod_python_pareto import spot_setup
+from spotpy.examples.spot_setup_hymod_python import spot_setup
 import matplotlib.pyplot as plt
 
 
+def multi_obj_func(evaluation, simulation):
+    #used to overwrite objective function in hymod example
+    like1 = abs(spotpy.objectivefunctions.pbias(evaluation, simulation))
+    like2 = spotpy.objectivefunctions.rmse(evaluation, simulation)
+    like3 = spotpy.objectivefunctions.rsquared(evaluation, simulation)*-1
+    return np.array([like1, like2, like3])
+
 if __name__ == "__main__":
     parallel ='seq' # Runs everthing in sequential mode
     np.random.seed(2000) # Makes the results reproduceable
@@ -27,138 +34,99 @@
     # Initialize the Hymod example
     # In this case, we tell the setup which algorithm we want to use, so
     # we can use this exmaple for different algorithms
-    spot_setup=spot_setup()
+    spot_setup=spot_setup(multi_obj_func)
     
     #Select number of maximum allowed repetitions
-    rep=3000
+    rep=1000
         
-    # Create the SCE-UA sampler of spotpy, alt_objfun is set to None to force SPOTPY
+    # Create the PADDS sampler of spotpy, alt_objfun is set to None to force SPOTPY
     # to jump into the def objectivefunction in the spot_setup class (default is
     # spotpy.objectivefunctions.rmse) 
     sampler=spotpy.algorithms.padds(spot_setup, dbname='padds_hymod', dbformat='csv')
     
-    #Start the sampler, one can specify ngs, kstop, peps and pcento id desired
+    #Start the sampler, one can specify the desired metric "ones", "chc", "hvc", "crowd_distance"
     print(sampler.sample(rep, metric="crowd_distance"))
     
-    # Load the results gained with the sceua sampler, stored in SCEUA_hymod.csv
-    #results = spotpy.analyser.load_csv_results('DDS_hymod')
-
-
+    # Load the results gained with the sceua sampler, stored in padds_hymod.csv
+    #results = spotpy.analyser.load_csv_results('padds_hymod')
     results = sampler.getdata()
-    from pprint import pprint
-    #pprint(results)
-    pprint(results['chain'])
-
-    for likno in range(1,5):
-        fig_like1 = plt.figure(1,figsize=(9,5))
-        plt.plot(results['like'+str(likno)])
-        plt.show()
-        fig_like1.savefig('hymod_padds_objectivefunction_' + str(likno) + '.png', dpi=300)
+    
+    
+    fig, ax=plt.subplots(3)
+    for likenr in range(3):
+        ax[likenr].plot(results['like'+str(likenr+1)])
+        ax[likenr].set_ylabel('like'+str(likenr+1))
+    fig.savefig('hymod_padds_objectivefunction.png', dpi=300)
 
 
-    plt.ylabel('RMSE')
-    plt.xlabel('Iteration')
 
     
     # Example plot to show the parameter distribution ###### 
+    def plot_parameter_trace(ax, results, parameter):
+        ax.plot(results['par'+parameter.name],'.')
+        ax.set_ylabel(parameter.name)
+        ax.set_ylim(parameter.minbound, parameter.maxbound)
+        
+    def plot_parameter_histogram(ax, results, parameter):
+        #chooses the last 20% of the sample
+        ax.hist(results['par'+parameter.name][int(len(results)*0.9):], 
+                 bins =np.linspace(parameter.minbound,parameter.maxbound,20))
+        ax.set_ylabel('Density')
+        ax.set_xlim(parameter.minbound, parameter.maxbound)
+        
     fig= plt.figure(2,figsize=(9,9))
-    normed_value = 1
-    
-    plt.subplot(5,2,1)
-    x = results['parcmax']
-    for i in range(int(max(results['chain'])-1)):
-        index=np.where(results['chain']==i+1) #Ignores burn-in chain
-        plt.plot(x[index],'.')
-    plt.ylabel('cmax')
-    plt.ylim(spot_setup.cmax.minbound, spot_setup.cmax.maxbound)
-    
-    
-    plt.subplot(5,2,2)
-    x = x[int(len(results)*0.9):] #choose the last 10% of the sample
-    hist, bins = np.histogram(x, bins=20, density=True)
-    widths = np.diff(bins)
-    hist *= normed_value
-    plt.bar(bins[:-1], hist, widths)
-    plt.ylabel('cmax')
-    plt.xlim(spot_setup.cmax.minbound, spot_setup.cmax.maxbound)
-    
-    
-    plt.subplot(5,2,3)
-    x = results['parbexp']
-    for i in range(int(max(results['chain'])-1)):
-        index=np.where(results['chain']==i+1)
-        plt.plot(x[index],'.')
-    plt.ylabel('bexp')
-    plt.ylim(spot_setup.bexp.minbound, spot_setup.bexp.maxbound)
-    
-    plt.subplot(5,2,4)
-    x = x[int(len(results)*0.9):]
-    hist, bins = np.histogram(x, bins=20, density=True)
-    widths = np.diff(bins)
-    hist *= normed_value
-    plt.bar(bins[:-1], hist, widths)
-    plt.ylabel('bexp')
-    plt.xlim(spot_setup.bexp.minbound, spot_setup.bexp.maxbound)
-    
-    
-    
-    plt.subplot(5,2,5)
-    x = results['paralpha']
-    print(x)
-    for i in range(int(max(results['chain'])-1)):
-        index=np.where(results['chain']==i+1)
-        plt.plot(x[index],'.')
-    plt.ylabel('alpha')
-    plt.ylim(spot_setup.alpha.minbound, spot_setup.alpha.maxbound)
-    
-    
-    plt.subplot(5,2,6)
-    x = x[int(len(results)*0.9):]
-    hist, bins = np.histogram(x, bins=20, density=True)
-    widths = np.diff(bins)
-    hist *= normed_value
-    plt.bar(bins[:-1], hist, widths)
-    plt.ylabel('alpha')
-    plt.xlim(spot_setup.alpha.minbound, spot_setup.alpha.maxbound)
-    
-    
-    plt.subplot(5,2,7)
-    x = results['parKs']
-    for i in range(int(max(results['chain'])-1)):
-        index=np.where(results['chain']==i+1)
-        plt.plot(x[index],'.')
-    plt.ylabel('Ks')
-    plt.ylim(spot_setup.Ks.minbound, spot_setup.Ks.maxbound)
-    
-    
-    plt.subplot(5,2,8)
-    x = x[int(len(results)*0.9):]
+    
+    ax1 = plt.subplot(5,2,1)
+    plot_parameter_trace(ax1, results, spot_setup.cmax)
+    
+    ax2 = plt.subplot(5,2,2)
+    plot_parameter_histogram(ax2,results, spot_setup.cmax)
+    
+    ax3 = plt.subplot(5,2,3)
+    plot_parameter_trace(ax3, results, spot_setup.bexp)
+    
+    ax4 = plt.subplot(5,2,4)
+    plot_parameter_histogram(ax4, results, spot_setup.bexp)
+        
+    ax5 = plt.subplot(5,2,5)
+    plot_parameter_trace(ax5, results, spot_setup.alpha)
+     
+    ax6 = plt.subplot(5,2,6)
+    plot_parameter_histogram(ax6, results, spot_setup.alpha)
 
-    hist, bins = np.histogram(x, bins=20, density=True)
-    widths = np.diff(bins)
-    hist *= normed_value
-    plt.bar(bins[:-1], hist, widths)
-    plt.ylabel('Ks')
-    plt.xlim(spot_setup.Ks.minbound, spot_setup.Ks.maxbound)
-    
-    
-    plt.subplot(5,2,9)
-    x = results['parKq']
-    for i in range(int(max(results['chain'])-1)):
-        index=np.where(results['chain']==i+1)
-        plt.plot(x[index],'.')
-    plt.ylabel('Kq')
-    plt.ylim(spot_setup.Kq.minbound, spot_setup.Kq.maxbound)
-    plt.xlabel('Iterations')
-    
-    plt.subplot(5,2,10)
-    x = x[int(len(results)*0.9):]
-    hist, bins = np.histogram(x, bins=20, density=True)
-    widths = np.diff(bins)
-    hist *= normed_value
-    plt.bar(bins[:-1], hist, widths)
-    plt.ylabel('Kq')
-    plt.xlabel('Parameter range')
-    plt.xlim(spot_setup.Kq.minbound, spot_setup.Kq.maxbound)
+    ax7 = plt.subplot(5,2,7)
+    plot_parameter_trace(ax7, results, spot_setup.Ks)
+    
+    ax8 = plt.subplot(5,2,8)
+    plot_parameter_histogram(ax8, results, spot_setup.Ks)
+
+    ax9 = plt.subplot(5,2,9)
+    plot_parameter_trace(ax9, results, spot_setup.Kq)
+    ax9.set_xlabel('Iterations')
+    
+    ax10 = plt.subplot(5,2,10)
+    plot_parameter_histogram(ax10, results, spot_setup.Kq)
+    ax10.set_xlabel('Parameter range')
+    
     plt.show()
-    fig.savefig('hymod_parameters.png',dpi=300)
\ No newline at end of file
+    fig.savefig('hymod_parameters.png',dpi=300)
+    
+    
+    # Example plot to show remaining parameter uncertainty #
+    fields=[word for word in results.dtype.names if word.startswith('sim')]
+    fig= plt.figure(3, figsize=(16,9))
+    ax11 = plt.subplot(1,1,1)
+    q5,q25,q75,q95=[],[],[],[]
+    for field in fields:
+        q5.append(np.percentile(results[field][-100:-1],2.5))
+        q95.append(np.percentile(results[field][-100:-1],97.5))
+    ax11.plot(q5,color='dimgrey',linestyle='solid')
+    ax11.plot(q95,color='dimgrey',linestyle='solid')
+    ax11.fill_between(np.arange(0,len(q5),1),list(q5),list(q95),facecolor='dimgrey',zorder=0,
+                    linewidth=0,label='parameter uncertainty')  
+    ax11.plot(spot_setup.evaluation(),'r.',label='data')
+    ax11.set_ylim(-50,450)
+    ax11.set_xlim(0,729)
+    ax11.legend()
+    fig.savefig('python_hymod.png',dpi=300)
+    #########################################################
\ No newline at end of file