diff --git a/oauthproxy.go b/oauthproxy.go
index 8e6cedb..09d9f2a 100644
--- a/oauthproxy.go
+++ b/oauthproxy.go
@@ -758,7 +758,7 @@ func (p *OAuthProxy) OAuthCallback(rw http.ResponseWriter, req *http.Request) {
 
 	s := strings.SplitN(req.Form.Get("state"), ":", 2)
 	if len(s) != 2 {
-		logger.Printf("Error while parsing OAuth2 state; invalid length")
+		logger.Printf("Error while parsing OAuth2 state: invalid length")
 		p.ErrorPage(rw, 500, "Internal Error", "Invalid State")
 		return
 	}
@@ -766,13 +766,13 @@ func (p *OAuthProxy) OAuthCallback(rw http.ResponseWriter, req *http.Request) {
 	redirect := s[1]
 	c, err := req.Cookie(p.CSRFCookieName)
 	if err != nil {
-		logger.PrintAuthf(session.Email, req, logger.AuthFailure, "Invalid authentication via OAuth2; unable too obtain CSRF cookie")
+		logger.PrintAuthf(session.Email, req, logger.AuthFailure, "Invalid authentication via OAuth2: unable too obtain CSRF cookie")
 		p.ErrorPage(rw, 403, "Permission Denied", err.Error())
 		return
 	}
 	p.ClearCSRFCookie(rw, req)
 	if c.Value != nonce {
-		logger.PrintAuthf(session.Email, req, logger.AuthFailure, "Invalid authentication via OAuth2; csrf token mismatch, potential attack")
+		logger.PrintAuthf(session.Email, req, logger.AuthFailure, "Invalid authentication via OAuth2: csrf token mismatch, potential attack")
 		p.ErrorPage(rw, 403, "Permission Denied", "csrf failed")
 		return
 	}
@@ -783,7 +783,7 @@ func (p *OAuthProxy) OAuthCallback(rw http.ResponseWriter, req *http.Request) {
 
 	// set cookie, or deny
 	if p.Validator(session.Email) && p.provider.ValidateGroup(session.Email) {
-		logger.PrintAuthf(session.Email, req, logger.AuthSuccess, "Authenticated via OAuth2; %s", session)
+		logger.PrintAuthf(session.Email, req, logger.AuthSuccess, "Authenticated via OAuth2: %s", session)
 		err := p.SaveSession(rw, req, session)
 		if err != nil {
 			logger.Printf("%s %s", remoteAddr, err)
@@ -792,7 +792,7 @@ func (p *OAuthProxy) OAuthCallback(rw http.ResponseWriter, req *http.Request) {
 		}
 		http.Redirect(rw, req, redirect, 302)
 	} else {
-		logger.PrintAuthf(session.Email, req, logger.AuthSuccess, "Invalid authentication via OAuth2; unauthorized")
+		logger.PrintAuthf(session.Email, req, logger.AuthSuccess, "Invalid authentication via OAuth2: unauthorized")
 		p.ErrorPage(rw, 403, "Permission Denied", "Invalid Account")
 	}
 }
@@ -852,7 +852,7 @@ func (p *OAuthProxy) Authenticate(rw http.ResponseWriter, req *http.Request) int
 	}
 
 	if session != nil && session.IsExpired() {
-		logger.Printf("Removing session; token expired %s", session)
+		logger.Printf("Removing session: token expired %s", session)
 		session = nil
 		saveSession = false
 		clearSession = true
@@ -860,7 +860,7 @@ func (p *OAuthProxy) Authenticate(rw http.ResponseWriter, req *http.Request) int
 
 	if saveSession && !revalidated && session != nil && session.AccessToken != "" {
 		if !p.provider.ValidateSessionState(session) {
-			logger.Printf("Removing session; error validating %s", session)
+			logger.Printf("Removing session: error validating %s", session)
 			saveSession = false
 			session = nil
 			clearSession = true
@@ -868,7 +868,7 @@ func (p *OAuthProxy) Authenticate(rw http.ResponseWriter, req *http.Request) int
 	}
 
 	if session != nil && session.Email != "" && !p.Validator(session.Email) {
-		logger.Printf(session.Email, req, logger.AuthFailure, "Invalid authentication via session; removing session %s", session)
+		logger.Printf(session.Email, req, logger.AuthFailure, "Invalid authentication via session: removing session %s", session)
 		session = nil
 		saveSession = false
 		clearSession = true
@@ -968,7 +968,7 @@ func (p *OAuthProxy) CheckBasicAuth(req *http.Request) (*providers.SessionState,
 		logger.PrintAuthf(pair[0], req, logger.AuthSuccess, "Authenticated via basic auth and HTpasswd File")
 		return &providers.SessionState{User: pair[0]}, nil
 	}
-	logger.PrintAuthf(pair[0], req, logger.AuthFailure, "Invalid authentication via basic auth; not in Htpasswd File")
+	logger.PrintAuthf(pair[0], req, logger.AuthFailure, "Invalid authentication via basic auth: not in Htpasswd File")
 	return nil, nil
 }