diff --git a/Cargo.lock b/Cargo.lock
index 97bf4ca..b29ef8e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -128,7 +128,7 @@ dependencies = [
 
 [[package]]
 name = "pingkeeper"
-version = "3.1.0"
+version = "3.1.1"
 dependencies = [
  "nix",
  "pipeliner",
diff --git a/Cargo.toml b/Cargo.toml
index 53e9a50..e5ebcd0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "pingkeeper"
 description = """
 Command line application that monitorizes that network is reachable (direct tcp connection or ping) and, in case of failure, runs a command. Optionally it can monitor that the command is permanently running and restart it if network is unreachable.
 """
-version = "3.1.0"
+version = "3.1.1"
 authors = ["Ignacio Lago <ignacio@ignaciolago.com>"]
 edition = "2018"
 readme = "README.md"
diff --git a/README.md b/README.md
index 8737992..34a747d 100644
--- a/README.md
+++ b/README.md
@@ -32,13 +32,13 @@ Three options:
 
 1.  Check the integrity of the downloaded file _(version may differ)_:
 
-        sha512sum --check pingkeeper-macos-v3.0.0.tar.gz.sha512
+        sha512sum --check pingkeeper-macos-v3.1.1.tar.gz.sha512
 
-    It should say: `pingkeeper-macos-v3.0.0.tar.gz: OK`
+    It should say: `pingkeeper-macos-v3.1.1.tar.gz: OK`
 
 1.  Extract archive _(version may differ)_ with:
 
-        tar xvf pingkeeper-macos-v3.0.0.tar.gz
+        tar xvf pingkeeper-macos-v3.1.1.tar.gz
 
 1.  Check the integrity of the binary file with:
 
@@ -170,6 +170,10 @@ Help available running `pingkeeper --help`:
 
 ## Changelog
 
+### v3.1.1
+
+- [x] fix error with option `-v`.
+
 ### v3.1.0
 
 - [x] support addresses with port in `--hosts`.