diff --git a/js2py/constructors/jsarraybuffer.py b/js2py/constructors/jsarraybuffer.py
index 6da71aab..d8d1a67e 100644
--- a/js2py/constructors/jsarraybuffer.py
+++ b/js2py/constructors/jsarraybuffer.py
@@ -5,7 +5,7 @@
 from ..base import *
 try:
     import numpy
-except:
+except ImportError:
     pass
 
 
diff --git a/js2py/constructors/jsfloat32array.py b/js2py/constructors/jsfloat32array.py
index 3a121916..5723d161 100644
--- a/js2py/constructors/jsfloat32array.py
+++ b/js2py/constructors/jsfloat32array.py
@@ -3,7 +3,7 @@
 from ..base import *
 try:
     import numpy
-except:
+except ImportError:
     pass
 
 
diff --git a/js2py/constructors/jsint8array.py b/js2py/constructors/jsint8array.py
index 3396afea..7a2c40a2 100644
--- a/js2py/constructors/jsint8array.py
+++ b/js2py/constructors/jsint8array.py
@@ -3,7 +3,7 @@
 from ..base import *
 try:
     import numpy
-except:
+except ImportError:
     pass
 
 
diff --git a/js2py/constructors/jsuint8array.py b/js2py/constructors/jsuint8array.py
index 4b2199da..2ada6b6d 100644
--- a/js2py/constructors/jsuint8array.py
+++ b/js2py/constructors/jsuint8array.py
@@ -3,7 +3,7 @@
 from ..base import *
 try:
     import numpy
-except:
+except ImportError:
     pass
 
 
diff --git a/js2py/translators/translator.py b/js2py/translators/translator.py
index 5ec47002..5252cab0 100644
--- a/js2py/translators/translator.py
+++ b/js2py/translators/translator.py
@@ -142,7 +142,7 @@ def translate_js_with_compilation_plan(js, HEADER=DEFAULT_HEADER):
     cp_hash = hashlib.md5(compilation_plan.encode('utf-8')).digest()
     try:
         python_code = cache[cp_hash]['proto_python_code']
-    except:
+    except KeyError:
         parser = pyjsparser.PyJsParser()
         parsed = parser.parse(compilation_plan)  # js to esprima syntax tree
         # Another way of doing that would be with my auto esprima translation but its much slower and causes import problems: