diff --git a/lib/script.py b/lib/script.py
index d29ce1a..fbb2337 100644
--- a/lib/script.py
+++ b/lib/script.py
@@ -209,7 +209,7 @@ class Script(object):
                     n += dlen
 
                 ops.append(op)
-        except:
+        except Exception:
             # Truncated script; e.g. tx_hash
             # ebc9fa1196a59e192352d76c0f6e73167046b9d37b8302b6bb6968dfd279b767
             raise ScriptError('truncated script')
diff --git a/query.py b/query.py
index 3824d71..283f33d 100755
--- a/query.py
+++ b/query.py
@@ -50,7 +50,7 @@ def main():
     try:
         limit = int(sys.argv[argc])
         argc += 1
-    except:
+    except Exception:
         limit = 10
     for addr in sys.argv[argc:]:
         print('Address: ', addr)
diff --git a/server/env.py b/server/env.py
index 2304284..167b2aa 100644
--- a/server/env.py
+++ b/server/env.py
@@ -83,7 +83,7 @@ class Env(LoggedClass):
             return default
         try:
             return int(value)
-        except:
+        except Exception:
             raise self.Error('cannot convert envvar {} value {} to an integer'
                              .format(envvar, value))