diff --git a/slides/intro/Container_Engines.md b/slides/intro/Container_Engines.md
index 74e1d608..0deff1bc 100644
--- a/slides/intro/Container_Engines.md
+++ b/slides/intro/Container_Engines.md
@@ -73,7 +73,7 @@ Containers also exist (sometimes with other names) on Windows, macOS, Solaris, F
 
 ## LXC
 
-* The venerable ancestor (first realeased in 2008).
+* The venerable ancestor (first released in 2008).
 
 * Docker initially relied on it to execute containers.
 
diff --git a/slides/intro/Dockerfile_Tips.md b/slides/intro/Dockerfile_Tips.md
index 3fc63116..6d06fd79 100644
--- a/slides/intro/Dockerfile_Tips.md
+++ b/slides/intro/Dockerfile_Tips.md
@@ -320,7 +320,7 @@ EXPOSE 5000
 
 This Compose file uses the same image, but with a few overrides for development:
 
-- the Flask development serve ris used (overriding `CMD`),
+- the Flask development server is used (overriding `CMD`),
 
 - the `DEBUG` environment variable is set,
 
diff --git a/slides/intro/Logging.md b/slides/intro/Logging.md
index 6e88b8ca..0fa11d95 100644
--- a/slides/intro/Logging.md
+++ b/slides/intro/Logging.md
@@ -213,7 +213,7 @@ $ docker-compose -f elk.yml up -d
 
   - it is set with the `ELASTICSEARCH_URL` environment variable,
 
-  - by default it is `localhost:9200`, we change it to `elastichsearch:9200`.
+  - by default it is `localhost:9200`, we change it to `elasticsearch:9200`.
 
 - We need to configure Logstash: