diff --git a/README.md b/README.md
index a8d5583..b3ac4a3 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ APEX adopts the functionality of the second-generation alloy properties calculat
 The comprehensive architecture of APEX is demonstrated below:
 
 <div>
-    <img src="./docs/images/apex_demo_v1.0.png" alt="Fig1" style="zoom: 35%;">
+    <img src="./docs/images/apex_demo.png" alt="Fig1" style="zoom: 35%;">
     <p style='font-size:1.0rem; font-weight:none'>Figure 1. APEX schematic diagram</p>
 </div>
 
diff --git a/apex/core/property/Phonon.py b/apex/core/property/Phonon.py
index 81dc228..275c667 100644
--- a/apex/core/property/Phonon.py
+++ b/apex/core/property/Phonon.py
@@ -165,7 +165,7 @@ def make_confs(self, path_to_work, path_to_equi, refine=False):
                     ss = Structure.from_file(equi_contcar)
                     # gen structure
 
-                # get user input slip parameter for specific structure
+                # get user input parameter for specific structure
                 st = StructureInfo(ss)
                 self.structure_type = st.lattice_structure
                 type_param = self.parameter.get(self.structure_type, None)
diff --git a/docs/images/apex_demo.png b/docs/images/apex_demo.png
index 0cf4847..53938bb 100644
Binary files a/docs/images/apex_demo.png and b/docs/images/apex_demo.png differ
diff --git a/docs/images/apex_demo_v1.0.png b/docs/images/apex_demo_v1.0.png
deleted file mode 100644
index b061666..0000000
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