diff --git a/README.md b/README.md
index 8381ed6904..390a71497b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-![TREZOR OS](docs/logo.png)
+![TREZOR Core](docs/logo.png)
 
 * [Documentation](docs/)
 
diff --git a/docs/README.md b/docs/README.md
index 590349b546..169c5200ea 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,5 +1,5 @@
-#TREZOR OS documentation
+#TREZOR Core documentation
 
-* [TREZOR OS API](api.md)
-* [TREZOR OS Bootloader](bootloader.md)
-* [TREZOR OS Image Format](toif.md)
+* [TREZOR Core API](api.md)
+* [TREZOR Core Bootloader](bootloader.md)
+* [TREZOR Core Image Format](toif.md)
diff --git a/docs/api.md b/docs/api.md
index 92948293cb..0725b39011 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -1,4 +1,4 @@
-#TREZOR OS API
+#TREZOR Core API
 
 Syntax used below is a valid Python function declaration with type hints defined in [PEP 0484](https://www.python.org/dev/peps/pep-0484/).
 
diff --git a/docs/bootloader.md b/docs/bootloader.md
index 368023338d..ed586ded3d 100644
--- a/docs/bootloader.md
+++ b/docs/bootloader.md
@@ -1,10 +1,10 @@
-#TREZOR OS Bootloader
+#TREZOR Core Bootloader
 
 All multibyte integer values are little endian!
 
 ##Firmware File Format
 
-TREZOR OS firmware file consists of 3 parts:
+TREZOR Core firmware file consists of 3 parts:
 
 1. vendor header
 2. firmware header