diff --git a/HowToUseOCR.md b/HowToUseOCR.md
index d68283f7..8607c28d 100644
--- a/HowToUseOCR.md
+++ b/HowToUseOCR.md
@@ -3,7 +3,7 @@
 This document provides instructions on how to add additional language packs for the OCR tab in Stirling-PDF, both inside and outside of Docker.
 
 ## My OCR used to work and now doesn't!
-The paths have changed for the tessadata locations on new docker images, please use ``/usr/share/tessdata`` (Others should still work for backwards compatability but might not)
+The paths have changed for the tessadata locations on new docker images, please use ``/usr/share/tessdata`` (Others should still work for backwards compatibility but might not)
 
 ## How does the OCR Work
 Stirling-PDF uses [OCRmyPDF](https://github.com/ocrmypdf/OCRmyPDF) which in turn uses tesseract for its text recognition.
diff --git a/src/main/java/stirling/software/SPDF/config/security/UserAuthenticationFilter.java b/src/main/java/stirling/software/SPDF/config/security/UserAuthenticationFilter.java
index 47423eb6..244efed3 100644
--- a/src/main/java/stirling/software/SPDF/config/security/UserAuthenticationFilter.java
+++ b/src/main/java/stirling/software/SPDF/config/security/UserAuthenticationFilter.java
@@ -82,7 +82,7 @@ public class UserAuthenticationFilter extends OncePerRequestFilter {
                 response.setStatus(HttpStatus.UNAUTHORIZED.value());
                 response.getWriter()
                         .write(
-                                "Authentication required. Please provide a X-API-KEY in request header.\nThis is found in Settings -> Account Settings -> API Key\nAlternativly you can disable authentication if this is unexpected");
+                                "Authentication required. Please provide a X-API-KEY in request header.\nThis is found in Settings -> Account Settings -> API Key\nAlternatively you can disable authentication if this is unexpected");
                 return;
             }
         }
diff --git a/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertBookToPDFController.java b/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertBookToPDFController.java
index 05784a15..41e6520d 100644
--- a/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertBookToPDFController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertBookToPDFController.java
@@ -37,7 +37,7 @@ public class ConvertBookToPDFController {
 
         if (!bookAndHtmlFormatsInstalled) {
             throw new IllegalArgumentException(
-                    "bookAndHtmlFormatsInstalled flag is False, this functionality is not avaiable");
+                    "bookAndHtmlFormatsInstalled flag is False, this functionality is not available");
         }
 
         if (fileInput == null) {
diff --git a/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToBookController.java b/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToBookController.java
index 28793d48..c8b9dd4d 100644
--- a/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToBookController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToBookController.java
@@ -45,7 +45,7 @@ public class ConvertPDFToBookController {
 
         if (!bookAndHtmlFormatsInstalled) {
             throw new IllegalArgumentException(
-                    "bookAndHtmlFormatsInstalled flag is False, this functionality is not avaiable");
+                    "bookAndHtmlFormatsInstalled flag is False, this functionality is not available");
         }
 
         if (fileInput == null) {