diff --git a/mysql/docker-compose.yaml b/mysql/docker-compose.yaml
index 54e2ba9..550833e 100644
--- a/mysql/docker-compose.yaml
+++ b/mysql/docker-compose.yaml
@@ -45,7 +45,7 @@ services:
 
   databases:
     container_name: databases
-    image: docker/whalesay
+    image: synthesizedio/whalesay
     command: >
       cowsay
         "Both databases have been started and are ready for TDK exercises!"
diff --git a/mysql/soda/checks_for_generation_from_scratch.yaml b/mysql/soda/checks_for_generation_from_scratch.yaml
index c71ce61..0d9f5b2 100644
--- a/mysql/soda/checks_for_generation_from_scratch.yaml
+++ b/mysql/soda/checks_for_generation_from_scratch.yaml
@@ -15,7 +15,7 @@ checks for country:
 
 checks for customer:
   - row_count = 10000
-  - invalid_count(email) = 2:
+  - invalid_count(email) = 0:
       valid format: email
 
 checks for film:
diff --git a/postgres/docker-compose.yaml b/postgres/docker-compose.yaml
index 3cb13ed..1c08416 100644
--- a/postgres/docker-compose.yaml
+++ b/postgres/docker-compose.yaml
@@ -52,7 +52,7 @@ services:
 
   databases:
     container_name: databases
-    image: docker/whalesay
+    image: synthesizedio/whalesay
     command: >
       cowsay
         "Both databases have been started and are ready for TDK exercises!"
diff --git a/vault/docker-compose.yaml b/vault/docker-compose.yaml
index 26afffd..0873f37 100644
--- a/vault/docker-compose.yaml
+++ b/vault/docker-compose.yaml
@@ -65,7 +65,7 @@ services:
 
   databases:
     container_name: databases
-    image: docker/whalesay
+    image: synthesizedio/whalesay
     command: >
       cowsay
         "Both databases and Hashicorp Vault have