diff --git a/exercises/practice/atbash-cipher/.meta/config.json b/exercises/practice/atbash-cipher/.meta/config.json
index 2e0d04499..f053a45e3 100644
--- a/exercises/practice/atbash-cipher/.meta/config.json
+++ b/exercises/practice/atbash-cipher/.meta/config.json
@@ -23,7 +23,7 @@
       ".meta/example.h"
     ]
   },
-  "blurb": "Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East.",
+  "blurb": "Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.",
   "source": "Wikipedia",
   "source_url": "https://en.wikipedia.org/wiki/Atbash"
 }
diff --git a/exercises/practice/collatz-conjecture/.meta/config.json b/exercises/practice/collatz-conjecture/.meta/config.json
index 9ccb7ce6d..ea2cdb5d3 100644
--- a/exercises/practice/collatz-conjecture/.meta/config.json
+++ b/exercises/practice/collatz-conjecture/.meta/config.json
@@ -22,6 +22,6 @@
     ]
   },
   "blurb": "Calculate the number of steps to reach 1 using the Collatz conjecture.",
-  "source": "An unsolved problem in mathematics named after mathematician Lothar Collatz",
-  "source_url": "https://en.wikipedia.org/wiki/3x_%2B_1_problem"
+  "source": "Wikipedia",
+  "source_url": "https://en.wikipedia.org/wiki/Collatz_conjecture"
 }
diff --git a/exercises/practice/grains/.meta/config.json b/exercises/practice/grains/.meta/config.json
index b6d225b63..ca78de924 100644
--- a/exercises/practice/grains/.meta/config.json
+++ b/exercises/practice/grains/.meta/config.json
@@ -25,5 +25,5 @@
   },
   "blurb": "Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.",
   "source": "The CodeRanch Cattle Drive, Assignment 6",
-  "source_url": "https://coderanch.com/wiki/718824/Grains"
+  "source_url": "https://web.archive.org/web/20240908084142/https://coderanch.com/wiki/718824/Grains"
 }
diff --git a/exercises/practice/hamming/.meta/config.json b/exercises/practice/hamming/.meta/config.json
index be989493e..637bf54d0 100644
--- a/exercises/practice/hamming/.meta/config.json
+++ b/exercises/practice/hamming/.meta/config.json
@@ -24,7 +24,7 @@
       ".meta/example.h"
     ]
   },
-  "blurb": "Calculate the Hamming difference between two DNA strands.",
+  "blurb": "Calculate the Hamming distance between two DNA strands.",
   "source": "The Calculating Point Mutations problem at Rosalind",
   "source_url": "https://rosalind.info/problems/hamm/"
 }
diff --git a/exercises/practice/leap/.meta/config.json b/exercises/practice/leap/.meta/config.json
index 652bb39a1..c556945cf 100644
--- a/exercises/practice/leap/.meta/config.json
+++ b/exercises/practice/leap/.meta/config.json
@@ -26,5 +26,5 @@
   },
   "blurb": "Determine whether a given year is a leap year.",
   "source": "CodeRanch Cattle Drive, Assignment 3",
-  "source_url": "https://coderanch.com/t/718816/Leap"
+  "source_url": "https://web.archive.org/web/20240907033714/https://coderanch.com/t/718816/Leap"
 }
diff --git a/exercises/practice/rna-transcription/.meta/config.json b/exercises/practice/rna-transcription/.meta/config.json
index 059579af5..79fcb0b84 100644
--- a/exercises/practice/rna-transcription/.meta/config.json
+++ b/exercises/practice/rna-transcription/.meta/config.json
@@ -23,7 +23,7 @@
       ".meta/example.h"
     ]
   },
-  "blurb": "Given a DNA strand, return its RNA Complement Transcription.",
+  "blurb": "Given a DNA strand, return its RNA complement.",
   "source": "Hyperphysics",
   "source_url": "https://web.archive.org/web/20220408112140/http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html"
 }
diff --git a/exercises/practice/say/.meta/config.json b/exercises/practice/say/.meta/config.json
index 67748e45c..f5eb4e066 100644
--- a/exercises/practice/say/.meta/config.json
+++ b/exercises/practice/say/.meta/config.json
@@ -25,5 +25,5 @@
   },
   "blurb": "Given a number from 0 to 999,999,999,999, spell out that number in English.",
   "source": "A variation on the JavaRanch CattleDrive, Assignment 4",
-  "source_url": "https://coderanch.com/wiki/718804"
+  "source_url": "https://web.archive.org/web/20240907035912/https://coderanch.com/wiki/718804"
 }